diff --git a/vlib/math/bits/bits.v b/vlib/math/bits/bits.v
index c8c6264629..b61504a64f 100644
--- a/vlib/math/bits/bits.v
+++ b/vlib/math/bits/bits.v
@@ -24,8 +24,8 @@ const (
 
 const (
 	// save importing math mod just for these
-	max_u32 = 4294967295
-	max_u64 = 18446744073709551615
+	max_u32 = u32(4294967295)
+	max_u64 = u64(18446744073709551615)
 )
 
 // --- LeadingZeros ---