1 files changed, 1 insertions, 1 deletions
diff --git a/cpp/allDemos.py b/cpp/allDemos.py
index b07ff86af3e..9e157cbcd55 100755
--- a/cpp/allDemos.py
+++ b/cpp/allDemos.py
@@ -15,7 +15,7 @@ for toplevel in [".", "..", "../..", "../../..", "../../../.."]:
     if os.path.exists(os.path.join(toplevel, "demoscript")):
         break
 else:
-    raise "can't find toplevel directory!"
+    raise RuntimeError("can't find toplevel directory!")
 
 sys.path.append(os.path.join(toplevel))
 from demoscript import Util