diff --git a/cg/cg5.cpp b/cg/cg5.cpp
index 55b1e6bf3..06fbeb84b 100755
--- a/cg/cg5.cpp
+++ b/cg/cg5.cpp
@@ -28,5 +28,6 @@ int main(int argc,char** argv)
   default:
     error_box(usage, argv[0]) ;
   }
+  exit(0);
   return 0;
 }