diff --git a/tests/errs1.c b/tests/errs1.c
index 30d6cf6..754f844 100644
--- a/tests/errs1.c
+++ b/tests/errs1.c
@@ -14,4 +14,4 @@
 void xxx  ( void ) { yyy(); }
 void www  ( void ) { xxx(); }
 
-void main ( void ) { www(); aaa(); }
+int main ( void ) { www(); aaa(); return 0; }