diff --git a/panda/src/grutil/ffmpegTexture.cxx b/panda/src/grutil/ffmpegTexture.cxx
index cf8b6aeca9..00ae4f90cf 100644
--- a/panda/src/grutil/ffmpegTexture.cxx
+++ b/panda/src/grutil/ffmpegTexture.cxx
@@ -307,7 +307,7 @@ update_frame(int frame) {
 bool FFMpegTexture::
 do_read_one(const Filename &fullpath, const Filename &alpha_fullpath,
             int z, int n, int primary_file_num_channels, int alpha_file_channel,
-            BamCacheRecord *record) {
+            bool header_only, BamCacheRecord *record) {
   if (record != (BamCacheRecord *)NULL) {
     record->add_dependent_file(fullpath);
   }
diff --git a/panda/src/grutil/ffmpegTexture.h b/panda/src/grutil/ffmpegTexture.h
index 5d31de9ab7..7439593308 100644
--- a/panda/src/grutil/ffmpegTexture.h
+++ b/panda/src/grutil/ffmpegTexture.h
@@ -51,7 +51,7 @@ protected:
   virtual void update_frame(int frame);
   virtual bool do_read_one(const Filename &fullpath, const Filename &alpha_fullpath,
                            int z, int n, int primary_file_num_channels, int alpha_file_channel,
-                           BamCacheRecord *record);
+                           bool header_only, BamCacheRecord *record);
   virtual bool do_load_one(const PNMImage &pnmimage, const string &name,
                            int z, int n);