diff --git a/libc/Android.mk b/libc/Android.mk
index 0c4fa6a..4ceb12f 100644
--- a/libc/Android.mk
+++ b/libc/Android.mk
@@ -217,6 +217,7 @@
 	string/__strcpy_chk.c \
 	string/__strlcat_chk.c \
 	string/__strlcpy_chk.c \
+	string/__strlen_chk.c \
 	string/__strncat_chk.c \
 	string/__strncpy_chk.c \
 	wchar/wcpcpy.c \