diff --git a/firmware/l0dable/system-include-hack.h b/firmware/l0dable/system-include-hack.h
index 4f8f217..f1f77e5 100644
--- a/firmware/l0dable/system-include-hack.h
+++ b/firmware/l0dable/system-include-hack.h
@@ -1,3 +1,4 @@
 size_t strlen(const char *s);
-char * strcpy(char * restrict dst, const char * restrict src);
-void * memcpy(void *dst, const void *src, size_t len);
+char  strcpy(char * restrict dst, const char * restrict src);
+void  memcpy(void *dst, const void *src, size_t len);
+void memset(void *s, int c, size_t n);