diff --git a/demos/modules/gwin/imagebox/gfxconf.h b/demos/modules/gwin/imagebox/gfxconf.h
index 7ff4dece..4db8be39 100644
--- a/demos/modules/gwin/imagebox/gfxconf.h
+++ b/demos/modules/gwin/imagebox/gfxconf.h
@@ -42,7 +42,7 @@
 #define GDISP_NEED_PIXELREAD                         FALSE
 #define GDISP_NEED_CONTROL                           FALSE
 #define GDISP_NEED_QUERY                             FALSE
-#define GDISP_NEED_MULTITHREAD                       FALSE
+#define GDISP_NEED_MULTITHREAD                       TRUE
 #define GDISP_NEED_STREAMING                         FALSE
 #define GDISP_NEED_TEXT                              TRUE
     #define GDISP_NEED_ANTIALIAS                     FALSE