diff --git a/indra/newview/llfloaterimcontainer.cpp b/indra/newview/llfloaterimcontainer.cpp
index 2789b78c2d..994a76189a 100644
--- a/indra/newview/llfloaterimcontainer.cpp
+++ b/indra/newview/llfloaterimcontainer.cpp
@@ -141,6 +141,8 @@ BOOL LLFloaterIMContainer::postBuild()
 	// mTabContainer will be initialized in LLMultiFloater::addChild()
 	
 	setTabContainer(getChild<LLTabContainer>("im_box_tab_container"));
+	mStubPanel = getChild<LLPanel>("stub_panel");
+    mStubTextBox = getChild<LLTextBox>("stub_textbox");
 
 	mConversationsStack = getChild<LLLayoutStack>("conversations_stack");
 	mConversationsPane = getChild<LLLayoutPanel>("conversations_layout_panel");
@@ -494,6 +496,16 @@ void LLFloaterIMContainer::tabClose()
 	}
 }
 
+void LLFloaterIMContainer::showStub(bool stub_is_visible)
+{
+	if (stub_is_visible)
+	{
+		mTabContainer->hideAllTabs();
+	}
+
+	mStubPanel->setVisible(stub_is_visible);
+}
+
 void LLFloaterIMContainer::setVisible(BOOL visible)
 {	LLFloaterIMNearbyChat* nearby_chat;
 	if (visible)
diff --git a/indra/newview/llfloaterimcontainer.h b/indra/newview/llfloaterimcontainer.h
index f65e946dad..a09cde60f5 100644
--- a/indra/newview/llfloaterimcontainer.h
+++ b/indra/newview/llfloaterimcontainer.h
@@ -71,6 +71,7 @@ public:
     BOOL selectConversationPair(const LLUUID& session_id, bool select_widget);
 
 	/*virtual*/ void tabClose();
+	void showStub(bool visible);
 
 	static LLFloater* getCurrentVoiceFloater();
 	static LLFloaterIMContainer* findInstance();
@@ -146,6 +147,8 @@ private:
 	void openNearbyChat();
 
 	LLButton* mExpandCollapseBtn;
+	LLPanel* mStubPanel;
+	LLTextBox* mStubTextBox;
 	LLLayoutPanel* mMessagesPane;
 	LLLayoutPanel* mConversationsPane;
 	LLLayoutStack* mConversationsStack;
diff --git a/indra/newview/llfloaterimsessiontab.cpp b/indra/newview/llfloaterimsessiontab.cpp
index c39319b373..3a1cc2880a 100644
--- a/indra/newview/llfloaterimsessiontab.cpp
+++ b/indra/newview/llfloaterimsessiontab.cpp
@@ -313,6 +313,7 @@ void LLFloaterIMSessionTab::onFocusReceived()
 	if (container)
 	{
 		container->selectConversationPair(mSessionID, true);
+		container->showStub(! getHost());
 	}
 }
 
diff --git a/indra/newview/skins/default/xui/en/floater_im_container.xml b/indra/newview/skins/default/xui/en/floater_im_container.xml
index 590ce45c33..e3db3d52ed 100644
--- a/indra/newview/skins/default/xui/en/floater_im_container.xml
+++ b/indra/newview/skins/default/xui/en/floater_im_container.xml
@@ -124,7 +124,47 @@
              left="0"
              name="im_box_tab_container"
              top="0"
-             width="412"/>
+             width="412">
+             <panel
+               follows="all"
+               layout="topleft"
+               name="stub_panel"
+               opaque="true"
+               top_pad="0"
+               left="0"
+               height="430"
+               width="412">
+                 <text
+                   type="string"
+                   clip_partial="false"
+                   follows="left|top"
+                   layout="topleft"
+                   left="20"
+                   right="-20"
+                   name="stub_textbox_1"
+                   top="10"
+                   height="20"
+                   valign="center"
+                   wrap="true">
+                   This conversation is in a separate window.
+                 </text>
+                 <text
+                   type="string"
+                   clip_partial="false"
+                   follows="left|top"
+                   layout="topleft"
+                   left="20"
+                   right="-20"
+                   name="stub_textbox_2"
+                   top="40"
+                   height="20"
+                   valign="center"
+                   parse_urls="false"
+                   wrap="true">
+                     Bring it back.
+                </text>
+             </panel>
+            </panel_container>
         </layout_panel>
     </layout_stack>
 </multi_floater>