diff --git a/src/org/opencms/ui/apps/CmsAppViewLayout.java b/src/org/opencms/ui/apps/CmsAppViewLayout.java
index <HASH>..<HASH> 100644
--- a/src/org/opencms/ui/apps/CmsAppViewLayout.java
+++ b/src/org/opencms/ui/apps/CmsAppViewLayout.java
@@ -64,6 +64,8 @@ public class CmsAppViewLayout extends CssLayout {
 
         Design.read("AppView.html", this);
         Responsive.makeResponsive(this);
+        // setting the width to 100% within the java code is required by the responsive resize listeners
+        setWidth("100%");
     }
 
     /**
Fixing responsive layout issue, where window size was only evaluated on
load.