diff --git a/include/common/standard.h b/include/common/standard.h
index 3f8d2d072..53d7f9f3b 100644
--- a/include/common/standard.h
+++ b/include/common/standard.h
@@ -815,7 +815,7 @@ static inline unsigned int my_ffsl(unsigned long a)
 	unsigned long cnt;
 
 #if defined(__x86_64__)
-	__asm__("bsr %1,%0\n" : "=r" (cnt) : "rm" (a));
+	__asm__("bsf %1,%0\n" : "=r" (cnt) : "rm" (a));
 	cnt++;
 #else