diff --git a/Utilities/Scripts/update-kwsys.bash b/Utilities/Scripts/update-kwsys.bash
index 83da8a40ec..d5485aaf79 100755
--- a/Utilities/Scripts/update-kwsys.bash
+++ b/Utilities/Scripts/update-kwsys.bash
@@ -15,6 +15,7 @@ readonly paths="
 
 extract_source () {
     git_archive
+    disable_custom_gitattributes
 }
 
 export HOOKS_ALLOW_KWSYS=1