diff --git a/.githooks/post-merge b/.githooks/post-merge
index 25cf2715e16db7f702472fc98e246538c2614732..395c0d3e428fd210d603eadb2f4a4f7db760eb2d 100755
--- a/.githooks/post-merge
+++ b/.githooks/post-merge
@@ -20,8 +20,8 @@ then
 fi
 if command -v helm > /dev/null
 then
-    echo Installing Hem plugins >&2
+    echo Installing Helm plugins >&2
     eval "$(grep 'export HELM_HOME' .bashrc)"
-    helm plugin remove diff
+    helm plugin list | { ! grep --silent '^diff'; } || helm plugin remove diff
     helm plugin install https://github.com/databus23/helm-diff --version master
 fi