1 files changed, 4 insertions, 0 deletions

diff --git a/include/mingw.h b/include/mingw.h
index 88da85243..4abdcf459 100644
--- a/include/mingw.h
+++ b/include/mingw.h
@@ -236,7 +236,11 @@ int strverscmp(const char *s1, const char *s2);
 /*
  * strings.h
  */
+#if !defined(__clang__)
 int ffs(int i);
+#else
+# define ffs(i) __builtin_ffs(i)
+#endif
 
 /*
  * sys/ioctl.h