diff --git a/Sources/NIOFoundationCompat/ByteBuffer-foundation.swift b/Sources/NIOFoundationCompat/ByteBuffer-foundation.swift
index fd6362bf7f..11d4c7e183 100644
--- a/Sources/NIOFoundationCompat/ByteBuffer-foundation.swift
+++ b/Sources/NIOFoundationCompat/ByteBuffer-foundation.swift
@@ -375,7 +375,8 @@ extension ByteBufferAllocator {
 }
 
 // MARK: - Conformances
-#if compiler(>=5.11)
+#if swift(>=5.8)
+#if hasFeature(RetroactiveAttribute)
 extension ByteBufferView: @retroactive ContiguousBytes {}
 extension ByteBufferView: @retroactive DataProtocol {}
 extension ByteBufferView: @retroactive MutableDataProtocol {}
@@ -384,6 +385,11 @@ extension ByteBufferView: ContiguousBytes {}
 extension ByteBufferView: DataProtocol {}
 extension ByteBufferView: MutableDataProtocol {}
 #endif
+#else
+extension ByteBufferView: ContiguousBytes {}
+extension ByteBufferView: DataProtocol {}
+extension ByteBufferView: MutableDataProtocol {}
+#endif
 
 extension ByteBufferView {
     public typealias Regions = CollectionOfOne<ByteBufferView>