diff --git a/sys.h b/sys.h
index ab746a1..b1f632b 100644
--- a/sys.h
+++ b/sys.h
@@ -16,5 +16,6 @@ uint32_t fork();
 void *memset(void* s, int c, unsigned long n) {
   int8_t* mem = s;
   for(long int i = 0; i < n; ++i) mem[i] = c;
+  return s;
 }
 #endif // !MINIMALSYS_H