1 files changed, 2 insertions, 2 deletions
diff --git a/compiler-rt/lib/builtins/ffssi2.c b/compiler-rt/lib/builtins/ffssi2.c
index cba1f72fdc61..ddb52927f8db 100644
--- a/compiler-rt/lib/builtins/ffssi2.c
+++ b/compiler-rt/lib/builtins/ffssi2.c
@@ -15,9 +15,9 @@
 // Returns: the index of the least significant 1-bit in a, or
 // the value zero if a is zero. The least significant bit is index one.
 
-COMPILER_RT_ABI si_int __ffssi2(si_int a) {
+COMPILER_RT_ABI int __ffssi2(si_int a) {
   if (a == 0) {
     return 0;
   }
-  return __builtin_ctz(a) + 1;
+  return ctzsi(a) + 1;
 }