diff --git a/haxe/io/Bytes.hx b/haxe/io/Bytes.hx
index 6d8b5f4e4..766929104 100644
--- a/haxe/io/Bytes.hx
+++ b/haxe/io/Bytes.hx
@@ -351,10 +351,10 @@ class Bytes {
 		#if neko_v21
 		untyped $sset32(b, pos, v, false);
 		#else
-		set(pos, v);
-		set(pos + 1, v >> 8);
-		set(pos + 2, v >> 16);
-		set(pos + 3, v >>> 24);
+		set(pos, v & 0xFF);
+		set(pos + 1, v >> 8 & 0xFF);
+		set(pos + 2, v >> 16 & 0xFF);
+		set(pos + 3, v >>> 24 & 0xFF);
 		#end
 	}