diff --git a/launch.sh b/launch.sh
index be228d543..0c73c667c 100755
--- a/launch.sh
+++ b/launch.sh
@@ -1,3 +1,3 @@
 #!/bin/sh
 cd "$(dirname $0)/src"
-exec python -m cProfile gajim.py "$@"
+exec python -OOt gajim.py "$@"