diff --git a/plugins/scheduler-docker-local/scheduler-inspect b/plugins/scheduler-docker-local/scheduler-inspect
index 39be0638e..efe42b23d 100755
--- a/plugins/scheduler-docker-local/scheduler-inspect
+++ b/plugins/scheduler-docker-local/scheduler-inspect
@@ -46,7 +46,7 @@ EOF
   local CONTAINER_FILES="$(find "$DOKKU_ROOT/$APP" -maxdepth 1 -name "CONTAINER.*" -printf "%f\n" 2>/dev/null | sort -t . -k 2 -n | xargs)"
   local CIDS=()
   for CONTAINER_FILE in $CONTAINER_FILES; do
-    CIDS+="$(<"$DOKKU_ROOT/$APP/$CONTAINER_FILE")"
+    CIDS+=("$(<"$DOKKU_ROOT/$APP/$CONTAINER_FILE")")
   done
 
   local PYTHON_BIN=python