diff --git a/libc/bionic/__strlen_chk.cpp b/libc/bionic/__strlen_chk.cpp
index 6ebf09c..151a497 100644
--- a/libc/bionic/__strlen_chk.cpp
+++ b/libc/bionic/__strlen_chk.cpp
@@ -56,7 +56,7 @@
 extern "C" size_t __strlen_chk(const char *s, size_t s_len) {
     size_t ret = strlen(s);
 
-    if (__builtin_expect(ret >= s_len, 0)) {
+    if (__predict_false(ret >= s_len)) {
         __fortify_chk_fail("strlen read overflow", 0);
     }