diff --git a/3rdparty/poppler/git/CairoFontEngine.cc b/3rdparty/poppler/git/CairoFontEngine.cc
index 229a86c..3b7b69a 100644
--- a/3rdparty/poppler/git/CairoFontEngine.cc
+++ b/3rdparty/poppler/git/CairoFontEngine.cc
@@ -59,7 +59,7 @@
 #endif
 
 /*
- * multi thread disabled by WangLu
+ * pdf2htmlEX: disabled multi thread 
 #if MULTITHREADED
 #  define fontEngineLocker()   MutexLocker locker(&mutex)
 #else
@@ -768,7 +768,7 @@ CairoFontEngine::CairoFontEngine(FT_Library libA) {
   useCIDs = major > 2 ||
             (major == 2 && (minor > 1 || (minor == 1 && patch > 7)));
 /*
- * multi thread disabled by WangLu
+ * pdf2htmlEX: disabled multi thread 
 #if MULTITHREADED
   gInitMutex(&mutex);
 #endif
@@ -783,7 +783,7 @@ CairoFontEngine::~CairoFontEngine() {
       delete fontCache[i];
   }
 /*
- * multi thread disabled by WangLu
+ * pdf2htmlEX: disabled multi thread 
 #if MULTITHREADED
   gDestroyMutex(&mutex);
 #endif
diff --git a/3rdparty/poppler/git/CairoFontEngine.h b/3rdparty/poppler/git/CairoFontEngine.h
index 432f107..96cc4c1 100644
--- a/3rdparty/poppler/git/CairoFontEngine.h
+++ b/3rdparty/poppler/git/CairoFontEngine.h
@@ -122,7 +122,7 @@ private:
   FT_Library lib;
   GBool useCIDs;
 /*
- * multi thread disabled by WangLu
+ * pdf2htmlEX: disabled multi thread 
 #if MULTITHREADED
   GooMutex mutex;
 #endif
diff --git a/3rdparty/poppler/git/CairoOutputDev.h b/3rdparty/poppler/git/CairoOutputDev.h
index 727c687..f345e39 100644
--- a/3rdparty/poppler/git/CairoOutputDev.h
+++ b/3rdparty/poppler/git/CairoOutputDev.h
@@ -272,7 +272,9 @@ protected:
   cairo_filter_t getFilterForSurface(cairo_surface_t *image,
 				     GBool interpolate);
   GBool getStreamData (Stream *str, char **buffer, int *length);
-  virtual void setMimeData(Stream *str, Object *ref, cairo_surface_t *image);
+  // pdf2htmlEX: make setMimeData virtual, we need to override it
+  virtual 
+  void setMimeData(Stream *str, Object *ref, cairo_surface_t *image);
   void fillToStrokePathClip(GfxState *state);
   void alignStrokeCoords(GfxSubpath *subpath, int i, double *x, double *y);