diff --git a/panda/src/grutil/ffmpegTexture.cxx b/panda/src/grutil/ffmpegTexture.cxx
index 0786360deb..0533c63bb9 100644
--- a/panda/src/grutil/ffmpegTexture.cxx
+++ b/panda/src/grutil/ffmpegTexture.cxx
@@ -506,6 +506,20 @@ void FFMpegTexture::
 do_get_bam_rawdata() {
 }
 
+////////////////////////////////////////////////////////////////////
+//     Function: FFMpegTexture::do_can_reload
+//       Access: Protected, Virtual
+//  Description: Returns true if we can safely call
+//               do_unlock_and_reload_ram_image() in order to make the
+//               image available, or false if we shouldn't do this
+//               (because we know from a priori knowledge that it
+//               wouldn't work anyway).
+////////////////////////////////////////////////////////////////////
+bool FFMpegTexture::
+do_can_reload() {
+  return false;
+}
+
 
 
 
diff --git a/panda/src/grutil/ffmpegTexture.h b/panda/src/grutil/ffmpegTexture.h
index 266c658f0e..9e58324268 100644
--- a/panda/src/grutil/ffmpegTexture.h
+++ b/panda/src/grutil/ffmpegTexture.h
@@ -62,6 +62,7 @@ protected:
 
   virtual bool do_has_bam_rawdata() const;
   virtual void do_get_bam_rawdata();
+  virtual bool do_can_reload();
 
 private:    
   class VideoPage;
diff --git a/panda/src/grutil/movieTexture.cxx b/panda/src/grutil/movieTexture.cxx
index 32088ac545..1aca90e071 100644
--- a/panda/src/grutil/movieTexture.cxx
+++ b/panda/src/grutil/movieTexture.cxx
@@ -498,6 +498,20 @@ void MovieTexture::
 do_get_bam_rawdata() {
 }
 
+////////////////////////////////////////////////////////////////////
+//     Function: MovieTexture::do_can_reload
+//       Access: Protected, Virtual
+//  Description: Returns true if we can safely call
+//               do_unlock_and_reload_ram_image() in order to make the
+//               image available, or false if we shouldn't do this
+//               (because we know from a priori knowledge that it
+//               wouldn't work anyway).
+////////////////////////////////////////////////////////////////////
+bool MovieTexture::
+do_can_reload() {
+  return false;
+}
+
 ////////////////////////////////////////////////////////////////////
 //     Function: MovieTexture::restart
 //       Access: Published
diff --git a/panda/src/grutil/movieTexture.h b/panda/src/grutil/movieTexture.h
index 10e9cecb94..13aa94b088 100644
--- a/panda/src/grutil/movieTexture.h
+++ b/panda/src/grutil/movieTexture.h
@@ -73,6 +73,7 @@ protected:
   virtual bool get_keep_ram_image() const;
   virtual bool do_has_bam_rawdata() const;
   virtual void do_get_bam_rawdata();
+  virtual bool do_can_reload();
 
   virtual bool do_adjust_this_size(int &x_size, int &y_size, const string &name, 
                                    bool for_padding);