diff --git a/lib/libc.c b/lib/libc.c
index 1b7f0ff4..d8e4fbe4 100644
--- a/lib/libc.c
+++ b/lib/libc.c
@@ -74,6 +74,7 @@ __mes_debug ()
 #include <stdio/fgetc.c>
 #include <stdio/ungetc.c>
 
+#include <string/memchr.c>
 #include <string/strcmp.c>
 #include <string/strcpy.c>
 #include <string/strncmp.c>