diff --git a/org.adempiere.ui.zk/WEB-INF/src/org/adempiere/webui/window/ZkJRViewer.java b/org.adempiere.ui.zk/WEB-INF/src/org/adempiere/webui/window/ZkJRViewer.java
index 95ac9db5e8..cc6a22d533 100644
--- a/org.adempiere.ui.zk/WEB-INF/src/org/adempiere/webui/window/ZkJRViewer.java
+++ b/org.adempiere.ui.zk/WEB-INF/src/org/adempiere/webui/window/ZkJRViewer.java
@@ -146,7 +146,8 @@ public class ZkJRViewer extends Window implements EventListener<Event>, ITabOnCl
 		North north = new North();
 		layout.appendChild(north);
 		north.appendChild(toolbar);
-
+		north.setVflex("min");
+		
 		Center center = new Center();
 		layout.appendChild(center);
 		iframe = new Iframe();
diff --git a/org.adempiere.ui.zk/WEB-INF/src/org/adempiere/webui/window/ZkReportViewer.java b/org.adempiere.ui.zk/WEB-INF/src/org/adempiere/webui/window/ZkReportViewer.java
index 7604a1f989..92093455dc 100644
--- a/org.adempiere.ui.zk/WEB-INF/src/org/adempiere/webui/window/ZkReportViewer.java
+++ b/org.adempiere.ui.zk/WEB-INF/src/org/adempiere/webui/window/ZkReportViewer.java
@@ -359,6 +359,7 @@ public class ZkReportViewer extends Window implements EventListener<Event>, ITab
 		North north = new North();
 		layout.appendChild(north);
 		north.appendChild(toolBar);
+		north.setVflex("min");
 		
 		Center center = new Center();
 		layout.appendChild(center);