diff --git a/src/commonMain/kotlin/com/infendro/bytes/bytearray/Operators.kt b/src/commonMain/kotlin/com/infendro/bytes/bytearray/Operators.kt
index d67afde..bf0e32c 100644
--- a/src/commonMain/kotlin/com/infendro/bytes/bytearray/Operators.kt
+++ b/src/commonMain/kotlin/com/infendro/bytes/bytearray/Operators.kt
@@ -5,25 +5,6 @@ import kotlin.experimental.inv
 import kotlin.experimental.or
 import kotlin.experimental.xor
 
-fun ByteArray.invInto(
-    destination: ByteArray,
-    destinationOffset: Int = 0,
-    startIndex: Int = 0,
-    endIndex: Int = size,
-) {
-    val length = endIndex - startIndex
-    require(length >= 0)
-    require(startIndex in 0..(size - length))
-    require(destinationOffset in 0..(destination.size - length))
-
-    repeat(length) { i ->
-        destination[destinationOffset + i] = this[startIndex + i].inv()
-    }
-}
-
-fun ByteArray.inv() =
-    ByteArray(size).also { invInto(it) }
-
 private inline fun ByteArray.combineInto(
     that: ByteArray,
     destination: ByteArray,
@@ -53,6 +34,25 @@ private inline fun ByteArray.combine(
     return ByteArray(size).also { combineInto(that, it, combine = combine) }
 }
 
+fun ByteArray.invInto(
+    destination: ByteArray,
+    destinationOffset: Int = 0,
+    startIndex: Int = 0,
+    endIndex: Int = size,
+) {
+    val length = endIndex - startIndex
+    require(length >= 0)
+    require(startIndex in 0..(size - length))
+    require(destinationOffset in 0..(destination.size - length))
+
+    repeat(length) { i ->
+        destination[destinationOffset + i] = this[startIndex + i].inv()
+    }
+}
+
+fun ByteArray.inv(): ByteArray =
+    ByteArray(size).also { invInto(it) }
+
 fun ByteArray.andInto(
     that: ByteArray,
     destination: ByteArray,
@@ -62,7 +62,7 @@ fun ByteArray.andInto(
     thatStartIndex: Int = 0,
 ) = combineInto(that, destination, destinationOffset, startIndex, endIndex, thatStartIndex) { a, b -> a and b }
 
-infix fun ByteArray.and(that: ByteArray) =
+infix fun ByteArray.and(that: ByteArray): ByteArray =
     combine(that) { a, b -> a and b }
 
 fun ByteArray.orInto(
@@ -74,7 +74,7 @@ fun ByteArray.orInto(
     thatStartIndex: Int = 0,
 ) = combineInto(that, destination, destinationOffset, startIndex, endIndex, thatStartIndex) { a, b -> a or b }
 
-infix fun ByteArray.or(that: ByteArray) =
+infix fun ByteArray.or(that: ByteArray): ByteArray =
     combine(that) { a, b -> a or b }
 
 fun ByteArray.xorInto(
@@ -86,5 +86,5 @@ fun ByteArray.xorInto(
     thatStartIndex: Int = 0,
 ) = combineInto(that, destination, destinationOffset, startIndex, endIndex, thatStartIndex) { a, b -> a xor b }
 
-infix fun ByteArray.xor(that: ByteArray) =
+infix fun ByteArray.xor(that: ByteArray): ByteArray =
     combine(that) { a, b -> a xor b }
diff --git a/src/commonMain/kotlin/com/infendro/bytes/int/Conversion.kt b/src/commonMain/kotlin/com/infendro/bytes/int/Conversion.kt
index 4efd00f..4faff12 100644
--- a/src/commonMain/kotlin/com/infendro/bytes/int/Conversion.kt
+++ b/src/commonMain/kotlin/com/infendro/bytes/int/Conversion.kt
@@ -3,8 +3,8 @@ package com.infendro.bytes.int
 import com.infendro.bytes.ByteOrder
 import com.infendro.bytes.ByteOrder.BIG_ENDIAN
 
-fun Int.toByteArray(order: ByteOrder = BIG_ENDIAN) =
+fun Int.toByteArray(order: ByteOrder = BIG_ENDIAN): ByteArray =
     ByteArray(4).also { copyInto(it, order = order) }
 
-fun Int.toUByteArray(order: ByteOrder = BIG_ENDIAN) =
+fun Int.toUByteArray(order: ByteOrder = BIG_ENDIAN): UByteArray =
     UByteArray(4).also { copyInto(it, order = order) }
diff --git a/src/commonMain/kotlin/com/infendro/bytes/intarray/Conversion.kt b/src/commonMain/kotlin/com/infendro/bytes/intarray/Conversion.kt
index 4e027d1..2eccdb5 100644
--- a/src/commonMain/kotlin/com/infendro/bytes/intarray/Conversion.kt
+++ b/src/commonMain/kotlin/com/infendro/bytes/intarray/Conversion.kt
@@ -3,8 +3,8 @@ package com.infendro.bytes.intarray
 import com.infendro.bytes.ByteOrder
 import com.infendro.bytes.ByteOrder.BIG_ENDIAN
 
-fun IntArray.toByteArray(order: ByteOrder = BIG_ENDIAN) =
+fun IntArray.toByteArray(order: ByteOrder = BIG_ENDIAN): ByteArray =
     ByteArray(size * 4).also { copyInto(it, order = order) }
 
-fun IntArray.toUByteArray(order: ByteOrder = BIG_ENDIAN) =
+fun IntArray.toUByteArray(order: ByteOrder = BIG_ENDIAN): UByteArray =
     UByteArray(size * 4).also { copyInto(it, order = order) }
diff --git a/src/commonMain/kotlin/com/infendro/bytes/long/Conversion.kt b/src/commonMain/kotlin/com/infendro/bytes/long/Conversion.kt
index 604edba..754b57a 100644
--- a/src/commonMain/kotlin/com/infendro/bytes/long/Conversion.kt
+++ b/src/commonMain/kotlin/com/infendro/bytes/long/Conversion.kt
@@ -3,8 +3,8 @@ package com.infendro.bytes.long
 import com.infendro.bytes.ByteOrder
 import com.infendro.bytes.ByteOrder.BIG_ENDIAN
 
-fun Long.toByteArray(order: ByteOrder = BIG_ENDIAN) =
+fun Long.toByteArray(order: ByteOrder = BIG_ENDIAN): ByteArray =
     ByteArray(8).also { copyInto(it, order = order) }
 
-fun Long.toUByteArray(order: ByteOrder = BIG_ENDIAN) =
+fun Long.toUByteArray(order: ByteOrder = BIG_ENDIAN): UByteArray =
     UByteArray(8).also { copyInto(it, order = order) }
diff --git a/src/commonMain/kotlin/com/infendro/bytes/longarray/Conversion.kt b/src/commonMain/kotlin/com/infendro/bytes/longarray/Conversion.kt
index eacb5ac..b98ae0e 100644
--- a/src/commonMain/kotlin/com/infendro/bytes/longarray/Conversion.kt
+++ b/src/commonMain/kotlin/com/infendro/bytes/longarray/Conversion.kt
@@ -3,8 +3,8 @@ package com.infendro.bytes.longarray
 import com.infendro.bytes.ByteOrder
 import com.infendro.bytes.ByteOrder.BIG_ENDIAN
 
-fun LongArray.toByteArray(order: ByteOrder = BIG_ENDIAN) =
+fun LongArray.toByteArray(order: ByteOrder = BIG_ENDIAN): ByteArray =
     ByteArray(size * 8).also { copyInto(it, order = order) }
 
-fun LongArray.toUByteArray(order: ByteOrder = BIG_ENDIAN) =
+fun LongArray.toUByteArray(order: ByteOrder = BIG_ENDIAN): UByteArray =
     UByteArray(size * 8).also { copyInto(it, order = order) }
diff --git a/src/commonMain/kotlin/com/infendro/bytes/ubytearray/Operators.kt b/src/commonMain/kotlin/com/infendro/bytes/ubytearray/Operators.kt
index e9a5e0a..ad136d4 100644
--- a/src/commonMain/kotlin/com/infendro/bytes/ubytearray/Operators.kt
+++ b/src/commonMain/kotlin/com/infendro/bytes/ubytearray/Operators.kt
@@ -12,7 +12,7 @@ fun UByteArray.invInto(
     endIndex: Int = size,
 ) = asByteArray().invInto(destination.asByteArray(), destinationOffset, startIndex, endIndex)
 
-fun UByteArray.inv() =
+fun UByteArray.inv(): UByteArray =
     UByteArray(size).also { invInto(it) }
 
 fun UByteArray.andInto(
@@ -31,7 +31,7 @@ fun UByteArray.andInto(
     thatStartIndex,
 )
 
-infix fun UByteArray.and(that: UByteArray) =
+infix fun UByteArray.and(that: UByteArray): UByteArray =
     UByteArray(size).also { andInto(that, it) }
 
 fun UByteArray.orInto(
@@ -50,7 +50,7 @@ fun UByteArray.orInto(
     thatStartIndex,
 )
 
-infix fun UByteArray.or(that: UByteArray) =
+infix fun UByteArray.or(that: UByteArray): UByteArray =
     UByteArray(size).also { orInto(that, it) }
 
 fun UByteArray.xorInto(
@@ -69,5 +69,5 @@ fun UByteArray.xorInto(
     thatStartIndex,
 )
 
-infix fun UByteArray.xor(that: UByteArray) =
+infix fun UByteArray.xor(that: UByteArray): UByteArray =
     UByteArray(size).also { xorInto(that, it) }
diff --git a/src/commonMain/kotlin/com/infendro/bytes/uint/Conversion.kt b/src/commonMain/kotlin/com/infendro/bytes/uint/Conversion.kt
index a5adfb9..714781f 100644
--- a/src/commonMain/kotlin/com/infendro/bytes/uint/Conversion.kt
+++ b/src/commonMain/kotlin/com/infendro/bytes/uint/Conversion.kt
@@ -3,8 +3,8 @@ package com.infendro.bytes.uint
 import com.infendro.bytes.ByteOrder
 import com.infendro.bytes.ByteOrder.BIG_ENDIAN
 
-fun UInt.toByteArray(order: ByteOrder = BIG_ENDIAN) =
+fun UInt.toByteArray(order: ByteOrder = BIG_ENDIAN): ByteArray =
     ByteArray(4).also { copyInto(it, order = order) }
 
-fun UInt.toUByteArray(order: ByteOrder = BIG_ENDIAN) =
+fun UInt.toUByteArray(order: ByteOrder = BIG_ENDIAN): UByteArray =
     UByteArray(4).also { copyInto(it, order = order) }
diff --git a/src/commonMain/kotlin/com/infendro/bytes/uintarray/Conversion.kt b/src/commonMain/kotlin/com/infendro/bytes/uintarray/Conversion.kt
index dec4318..7b88e50 100644
--- a/src/commonMain/kotlin/com/infendro/bytes/uintarray/Conversion.kt
+++ b/src/commonMain/kotlin/com/infendro/bytes/uintarray/Conversion.kt
@@ -3,8 +3,8 @@ package com.infendro.bytes.uintarray
 import com.infendro.bytes.ByteOrder
 import com.infendro.bytes.ByteOrder.BIG_ENDIAN
 
-fun UIntArray.toByteArray(order: ByteOrder = BIG_ENDIAN) =
+fun UIntArray.toByteArray(order: ByteOrder = BIG_ENDIAN): ByteArray =
     ByteArray(size * 4).also { copyInto(it, order = order) }
 
-fun UIntArray.toUByteArray(order: ByteOrder = BIG_ENDIAN) =
+fun UIntArray.toUByteArray(order: ByteOrder = BIG_ENDIAN): UByteArray =
     UByteArray(size * 4).also { copyInto(it, order = order) }
diff --git a/src/commonMain/kotlin/com/infendro/bytes/ulong/Conversion.kt b/src/commonMain/kotlin/com/infendro/bytes/ulong/Conversion.kt
index 1a931f4..4e26af5 100644
--- a/src/commonMain/kotlin/com/infendro/bytes/ulong/Conversion.kt
+++ b/src/commonMain/kotlin/com/infendro/bytes/ulong/Conversion.kt
@@ -3,8 +3,8 @@ package com.infendro.bytes.ulong
 import com.infendro.bytes.ByteOrder
 import com.infendro.bytes.ByteOrder.BIG_ENDIAN
 
-fun ULong.toByteArray(order: ByteOrder = BIG_ENDIAN) =
+fun ULong.toByteArray(order: ByteOrder = BIG_ENDIAN): ByteArray =
     ByteArray(8).also { copyInto(it, order = order) }
 
-fun ULong.toUByteArray(order: ByteOrder = BIG_ENDIAN) =
+fun ULong.toUByteArray(order: ByteOrder = BIG_ENDIAN): UByteArray =
     UByteArray(8).also { copyInto(it, order = order) }
diff --git a/src/commonMain/kotlin/com/infendro/bytes/ulongarray/Conversion.kt b/src/commonMain/kotlin/com/infendro/bytes/ulongarray/Conversion.kt
index c412293..b80cd38 100644
--- a/src/commonMain/kotlin/com/infendro/bytes/ulongarray/Conversion.kt
+++ b/src/commonMain/kotlin/com/infendro/bytes/ulongarray/Conversion.kt
@@ -3,8 +3,8 @@ package com.infendro.bytes.ulongarray
 import com.infendro.bytes.ByteOrder
 import com.infendro.bytes.ByteOrder.BIG_ENDIAN
 
-fun ULongArray.toByteArray(order: ByteOrder = BIG_ENDIAN) =
+fun ULongArray.toByteArray(order: ByteOrder = BIG_ENDIAN): ByteArray =
     ByteArray(size * 8).also { copyInto(it, order = order) }
 
-fun ULongArray.toUByteArray(order: ByteOrder = BIG_ENDIAN) =
+fun ULongArray.toUByteArray(order: ByteOrder = BIG_ENDIAN): UByteArray =
     UByteArray(size * 8).also { copyInto(it, order = order) }