diff --git a/libc/stdio/lib_sscanf.c b/libc/stdio/lib_sscanf.c
index 3e8cd6c9ecf..7c73e476eac 100644
--- a/libc/stdio/lib_sscanf.c
+++ b/libc/stdio/lib_sscanf.c
@@ -159,7 +159,7 @@ int sscanf(FAR const char *buf, FAR const char *fmt, ...)
  *    ANSI standard vsscanf implementation.
  *
  ****************************************************************************/
-#pragma GCC optimize ("O0")
+
 int vsscanf(FAR const char *buf, FAR const char *fmt, va_list ap)
 {
   FAR const char *bufstart;