diff --git a/vlib/builtin/int.v b/vlib/builtin/int.v
index fc71270bf1..919ffbe5d8 100644
--- a/vlib/builtin/int.v
+++ b/vlib/builtin/int.v
@@ -31,7 +31,7 @@ pub fn (a f64) eq(b f64) bool {
 	return C.fabs(a - b) <= C.DBL_EPSILON	
 }
 pub fn (a f32) eq(b f32) bool {
-	return C.fabs(a - b) <= C.FLT_EPSILON	
+	return C.fabsf(a - b) <= C.FLT_EPSILON	
 }
 pub fn (a f64) eqbit(b f64) bool {
 	return C.DEFAULT_EQUAL(a, b)
diff --git a/vlib/builtin/string.v b/vlib/builtin/string.v
index 6f62fb3e90..6d4b581e36 100644
--- a/vlib/builtin/string.v
+++ b/vlib/builtin/string.v
@@ -202,9 +202,9 @@ pub fn (s string) u32() u32 {
 
 pub fn (s string) u64() u64 {
 	//$if tinyc {
-		return u64(s.int()) // TODO
+		//return u64(s.int()) // TODO
 	//} $else {
-		//return C.strtoull(*char(s.str), 0, 0)
+		return C.strtoull(*char(s.str), 0, 0)
 	//}
 	//return C.atoll(s.str) // temporary fix for tcc on windows.
 }