diff --git a/templates/generate b/templates/generate
index e4925cec..e8772483 100755
--- a/templates/generate
+++ b/templates/generate
@@ -81,7 +81,7 @@ def main():
         print("Usage:")
         print("  generate <outfile> <version> < input.json")
         print()
-        raise RuntimeError("Arg error")
+        sys.exit(1)
 
     outfile = sys.argv[1]
     version = sys.argv[2]