diff --git a/icdiff b/icdiff
old mode 100755
new mode 100644
index 3e4e8721e8..b24847eac6
--- a/icdiff
+++ b/icdiff
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 """ icdiff.py