diff --git a/hooks/post-checkout b/hooks/post-checkout
index 51d9142..876074e 100755
--- a/hooks/post-checkout
+++ b/hooks/post-checkout
@@ -40,7 +40,7 @@ THREAD_KEY=${BUILDKITE_PLUGIN_HANGOUTS_NOTIFY_THREAD_KEY:=$CURRENT_COMMIT}
 
 FAIL=0
 ROWS_JSON="none"
-if [ $TYPE == 'CARD' ]
+if [[ "${TYPE}" == "CARD'" ]]
   then
 
   IFS=, read -r CARD_TITLE CARD_SUBTITLE BUILD_URL <<< "$CARD_DETAILS"