diff --git a/libc/arch-arm/generic/bionic/strlen.c b/libc/arch-arm/generic/bionic/strlen.c
index b9f3a2a..f6b9209 100644
--- a/libc/arch-arm/generic/bionic/strlen.c
+++ b/libc/arch-arm/generic/bionic/strlen.c
@@ -29,7 +29,7 @@
 #include <string.h>
 #include <stdint.h>
 
-size_t strlen(const char *s)
+size_t strlen(const char *s) __overloadable
 {
     __builtin_prefetch(s);
     __builtin_prefetch(s+32);