diff --git a/lib/stdlib/malloc.c b/lib/stdlib/malloc.c
index d9892308..940f95b5 100644
--- a/lib/stdlib/malloc.c
+++ b/lib/stdlib/malloc.c
@@ -25,7 +25,7 @@ malloc (size_t size)
 {
   if (!__brk)
     __brk = brk (0);
-  if (brk (__brk + size) == (void*)-1)
+  if (brk (__brk + size) == -1)
     return 0;
   char *p = __brk;
   __brk += size;