diff --git a/test/default/cmptest.h b/test/default/cmptest.h
index 7e4c894d..6d62c2c2 100644
--- a/test/default/cmptest.h
+++ b/test/default/cmptest.h
@@ -79,6 +79,7 @@ int main(void)
     return 0;
 }
 
+#undef  printf
 #define printf(...) do { } while(0)
 
 #elif !defined(BROWSER_TESTS)