diff --git a/jjb/shell/tagcollisionreject.sh b/jjb/shell/tagcollisionreject.sh
index 7a2307a..85015d4 100755
--- a/jjb/shell/tagcollisionreject.sh
+++ b/jjb/shell/tagcollisionreject.sh
@@ -123,7 +123,7 @@
 
     done
 
-  done  < <( find "${WORKSPACE}" -name 'Dockerfile*' -print0 )
+  done  < <( find "${WORKSPACE}" -name 'Dockerfile*' ! -path "*/vendor/*" -print0 )
 }
 
 echo "Checking git repo with remotes:"