diff --git a/qrenderdoc/Code/Interface/QRDInterface.h b/qrenderdoc/Code/Interface/QRDInterface.h
index 81ccecb97..27a044f49 100644
--- a/qrenderdoc/Code/Interface/QRDInterface.h
+++ b/qrenderdoc/Code/Interface/QRDInterface.h
@@ -286,6 +286,17 @@ This may not be possible on all OSs, so the function is not guaranteed to succee
 )");
   virtual void BringToFront() = 0;
 
+  DOCUMENT(R"(Prompt the user to close the currently open capture file. This will go through the
+normal workflow and ask the user to save any unsaved capture.
+
+If no capture is open, this function returns True immediately.
+
+:return: True if no capture was open, or if it was successfully closed. False if the capture is
+  still open due to user interactions.
+:rtype: bool
+)");
+  virtual bool PromptCloseCapture() = 0;
+
 protected:
   IMainWindow() = default;
   ~IMainWindow() = default;
diff --git a/qrenderdoc/Code/pyrenderdoc/PythonInvokers.cpp b/qrenderdoc/Code/pyrenderdoc/PythonInvokers.cpp
index c5adacbc3..60c8e6bb0 100644
--- a/qrenderdoc/Code/pyrenderdoc/PythonInvokers.cpp
+++ b/qrenderdoc/Code/pyrenderdoc/PythonInvokers.cpp
@@ -797,6 +797,7 @@ struct IMainWindowInvoker : UIThreadInvoker<IMainWindow>
     return InvokeVoidFunction(&IMainWindow::UnregisterShortcut, shortcut, widget);
   }
   void BringToFront() { return InvokeVoidFunction(&IMainWindow::BringToFront); }
+  bool PromptCloseCapture() { return InvokeRetFunction<bool>(&IMainWindow::PromptCloseCapture); }
 };
 
 struct IEventBrowserInvoker : UIThreadInvoker<IEventBrowser>
diff --git a/qrenderdoc/Windows/MainWindow.h b/qrenderdoc/Windows/MainWindow.h
index fe6ca81e5..88ef24749 100644
--- a/qrenderdoc/Windows/MainWindow.h
+++ b/qrenderdoc/Windows/MainWindow.h
@@ -84,6 +84,7 @@ public:
   void RegisterShortcut(const rdcstr &shortcut, QWidget *widget, ShortcutCallback callback) override;
   void UnregisterShortcut(const rdcstr &shortcut, QWidget *widget) override;
   void BringToFront() override;
+  bool PromptCloseCapture() override;
 
   // ICaptureViewer
   void OnCaptureLoaded() override;
@@ -118,7 +119,6 @@ public:
   void ShowLiveCapture(LiveCapture *live);
   void LiveCaptureClosed(LiveCapture *live);
 
-  bool PromptCloseCapture();
   bool PromptSaveCaptureAs();
   bool SaveCurrentCapture(QString saveFilename);
 
diff --git a/qrenderdoc/qrenderdoc_local.vcxproj b/qrenderdoc/qrenderdoc_local.vcxproj
index a42d4f6bd..154de4f83 100644
--- a/qrenderdoc/qrenderdoc_local.vcxproj
+++ b/qrenderdoc/qrenderdoc_local.vcxproj
@@ -588,7 +588,9 @@
     </ClCompile>
     <ClCompile Include="Code\qprocessinfo.cpp" />
     <ClCompile Include="Code\pyrenderdoc\PythonContext.cpp" />
-    <ClCompile Include="Code\pyrenderdoc\PythonInvokers.cpp" />
+    <ClCompile Include="Code\pyrenderdoc\PythonInvokers.cpp">
+      <AdditionalOptions>/bigobj %(AdditionalOptions)</AdditionalOptions>
+    </ClCompile>
     <ClCompile Include="Code\QRDUtils.cpp" />
     <ClCompile Include="Code\MiniQtHelper.cpp" />
     <ClCompile Include="Code\Resources.cpp" />