diff --git a/extras/Introjucer/Source/Project/jucer_ProjectContentComponent.cpp b/extras/Introjucer/Source/Project/jucer_ProjectContentComponent.cpp
index 6db164c38a..45c45fad06 100644
--- a/extras/Introjucer/Source/Project/jucer_ProjectContentComponent.cpp
+++ b/extras/Introjucer/Source/Project/jucer_ProjectContentComponent.cpp
@@ -496,19 +496,25 @@ void ProjectContentComponent::updateMainWindowTitle()
     if (MainWindow* mw = findParentComponentOfClass<MainWindow>())
     {
         String title;
+        File file;
         bool edited = false;
 
         if (currentDocument != nullptr)
         {
             title = currentDocument->getName();
             edited = currentDocument->needsSaving();
+            file = currentDocument->getFile();
         }
 
         if (ComponentPeer* peer = mw->getPeer())
+        {
             if (! peer->setDocumentEditedStatus (edited))
                 if (edited)
                     title << "*";
 
+            peer->setRepresentedFile (file);
+        }
+
         mw->updateTitle (title);
     }
 }
diff --git a/modules/juce_gui_basics/native/juce_mac_NSViewComponentPeer.mm b/modules/juce_gui_basics/native/juce_mac_NSViewComponentPeer.mm
index 00cd161737..2684c2b297 100644
--- a/modules/juce_gui_basics/native/juce_mac_NSViewComponentPeer.mm
+++ b/modules/juce_gui_basics/native/juce_mac_NSViewComponentPeer.mm
@@ -213,6 +213,14 @@ public:
         return true;
     }
 
+    void setRepresentedFile (const File& file)
+    {
+        if (! isSharedWindow)
+            [window setRepresentedFilename: juceStringToNS (file != File::nonexistent
+                                                                ? file.getFullPathName()
+                                                                : String::empty)];
+    }
+
     void setPosition (int x, int y)
     {
         setBounds (x, y, component.getWidth(), component.getHeight(), false);
diff --git a/modules/juce_gui_basics/windows/juce_ComponentPeer.cpp b/modules/juce_gui_basics/windows/juce_ComponentPeer.cpp
index 580d821bf9..f545b5263b 100644
--- a/modules/juce_gui_basics/windows/juce_ComponentPeer.cpp
+++ b/modules/juce_gui_basics/windows/juce_ComponentPeer.cpp
@@ -559,6 +559,10 @@ bool ComponentPeer::setDocumentEditedStatus (bool)
     return false;
 }
 
+void ComponentPeer::setRepresentedFile (const File&)
+{
+}
+
 //==============================================================================
 void ComponentPeer::clearMaskedRegion()
 {
diff --git a/modules/juce_gui_basics/windows/juce_ComponentPeer.h b/modules/juce_gui_basics/windows/juce_ComponentPeer.h
index 98227240dd..76898b4e00 100644
--- a/modules/juce_gui_basics/windows/juce_ComponentPeer.h
+++ b/modules/juce_gui_basics/windows/juce_ComponentPeer.h
@@ -127,6 +127,13 @@ public:
     */
     virtual bool setDocumentEditedStatus (bool edited);
 
+    /** If this type of window is capable of indicating that it represents a file, then
+        this lets you set the file.
+
+        E.g. in OSX it'll show an icon for the file in the title bar.
+    */
+    virtual void setRepresentedFile (const File&);
+
     //==============================================================================
     /** Moves the window without changing its size.