diff --git a/libc/include/string.h b/libc/include/string.h
index f8c573c..1691b16 100644
--- a/libc/include/string.h
+++ b/libc/include/string.h
@@ -49,6 +49,7 @@
 extern char*  strrchr(const char *, int) __purefunc;
 
 extern size_t strlen(const char *) __purefunc;
+extern size_t __strlen_chk(const char *, size_t);
 extern int    strcmp(const char *, const char *) __purefunc;
 extern char*  strcpy(char* __restrict, const char* __restrict);
 extern char*  strcat(char* __restrict, const char* __restrict);
@@ -207,8 +208,6 @@
     return __strlcat_chk(dest, src, size, bos);
 }
 
-extern size_t __strlen_chk(const char *, size_t);
-
 __BIONIC_FORTIFY_INLINE
 size_t strlen(const char *s) {
     size_t bos = __bos(s);