diff --git a/README.md b/README.md
index 6024d58c..d22e5faf 100644
--- a/README.md
+++ b/README.md
@@ -142,7 +142,7 @@ const GridsterConfigService: GridsterConfig = {
   itemResizeCallback: undefined,  // callback to call for each item when width/height changes. Arguments:gridsterItem
   draggable: {
     enabled: false, // enable/disable draggable items
-    ignoreContentClass: 'gridster-item-content', // default content class to ignore the drag event from 
+    ignoreContentClass: 'gridster-item-content', // default content class to ignore the drag event from Warning: the class should have user-select: auto;
     stop: undefined // callback when dragging an item stops.  Accepts Promise return to cancel/approve drag.
     // Arguments: item, gridsterItem, event
   },