diff --git a/vlib/hash/hash_wyhash_test.v b/vlib/hash/hash_wyhash_test.v
index 1abfbbdd72..79b752d462 100644
--- a/vlib/hash/hash_wyhash_test.v
+++ b/vlib/hash/hash_wyhash_test.v
@@ -1,4 +1,4 @@
-import hash as wyhash
+module hash
 
 struct WyHashTest {
 	s        string
@@ -13,9 +13,13 @@ fn test_wyhash() {
 		WyHashTest{'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789', 5, 0xe062dfda99413626},
 	]
 	for test in tests {
-		got := wyhash.sum64(test.s.bytes(), test.seed)
+		got := wyhash64(test.s.str, u64(test.s.len), test.seed)
 		// println(' #      GOT: $got | $got.hex()')
 		// println(' # EXPECTED: $test.expected | $test.expected.hex()')
 		assert got == test.expected
 	}
+
+	s := '/v/vmaster/vlib/v/fmt/tests/maps_of_fns_with_string_keys_keep.vv'
+	x := sum64_string(s, 5).hex_full()
+	println(x)
 }
diff --git a/vlib/hash/wyhash.v b/vlib/hash/wyhash.v
index 160c8f1b7f..8158bd9d12 100644
--- a/vlib/hash/wyhash.v
+++ b/vlib/hash/wyhash.v
@@ -25,15 +25,16 @@ const (
 
 [inline]
 pub fn sum64_string(key string, seed u64) u64 {
-	return wyhash64(key.str, u64(key.len), seed)
+	return wyhash_c(key.str, u64(key.len), seed)
 }
 
 [inline]
 pub fn sum64(key []byte, seed u64) u64 {
-	return wyhash64(&byte(key.data), u64(key.len), seed)
+	return wyhash_c(&byte(key.data), u64(key.len), seed)
 }
 
-[inline]
+// This is an outdated version of wyhash with memory errors!
+[deprecated; inline]
 fn wyhash64(key &byte, len u64, seed_ u64) u64 {
 	if len == 0 {
 		return 0