diff --git a/vlib/compiler/cheaders.v b/vlib/compiler/cheaders.v
index 47e46e73bb..5b13f581a3 100644
--- a/vlib/compiler/cheaders.v
+++ b/vlib/compiler/cheaders.v
@@ -240,6 +240,10 @@ static	inline	uint64_t	wyhash64(uint64_t	A, uint64_t	B) {	return	_wymum(_wymum(A
 static	inline	uint64_t	wyrand(uint64_t	*seed) {	*seed+=_wyp0;	return	_wymum(*seed^_wyp1,*seed);	}
 static	inline	double	wy2u01(uint64_t	r) {	const	double	_wynorm=1.0/(1ull<<52);	return	(r>>11)*_wynorm;	}
 static	inline	double	wy2gau(uint64_t	r) {	const	double	_wynorm=1.0/(1ull<<20);	return	((r&0x1fffff)+((r>>21)&0x1fffff)+((r>>42)&0x1fffff))*_wynorm-3.0;	}
+static inline uint64_t fastest_hash(const void *key, size_t len, uint64_t seed) {
+  const uint8_t *p = (const uint8_t *)key;
+  return _like_(len >= 4) ? (_wyr4(p) + _wyr4(p + len - 4)) * (_wyr4(p + (len >> 1) - 2) ^ seed) : (_like_(len) ? _wyr3(p, len) * (_wyp0 ^ seed) : seed);
+}
 #endif
 
 '