diff --git a/plugins/common/functions b/plugins/common/functions
index 0b186dff1..0d790bf9d 100755
--- a/plugins/common/functions
+++ b/plugins/common/functions
@@ -184,13 +184,13 @@ get_app_container_ids() {
   [[ -f $DOKKU_ROOT/$APP/CONTAINER ]] && DOKKU_CIDS+=$(< $DOKKU_ROOT/$APP/CONTAINER)
 
   if [[ -n "$CONTAINER_TYPE" ]]; then
-    CONTAINER_PATTERN=$DOKKU_ROOT/$APP/CONTAINER.$CONTAINER_TYPE.*
+    CONTAINER_PATTERN="$DOKKU_ROOT/$APP/CONTAINER.$CONTAINER_TYPE.*"
     if [[ $CONTAINER_TYPE == *.* ]]; then
-      CONTAINER_PATTERN=$DOKKU_ROOT/$APP/CONTAINER.$CONTAINER_TYPE
+      CONTAINER_PATTERN="$DOKKU_ROOT/$APP/CONTAINER.$CONTAINER_TYPE"
       [[ ! -f $CONTAINER_PATTERN ]] && echo "" && return 0
     fi
   else
-    CONTAINER_PATTERN=$DOKKU_ROOT/$APP/CONTAINER.*
+    CONTAINER_PATTERN="$DOKKU_ROOT/$APP/CONTAINER.*"
   fi
 
   shopt -s nullglob