diff --git a/extern/osg-ffmpeg-videoplayer/videostate.cpp b/extern/osg-ffmpeg-videoplayer/videostate.cpp
index 1b02e13be..8a9cce1b7 100644
--- a/extern/osg-ffmpeg-videoplayer/videostate.cpp
+++ b/extern/osg-ffmpeg-videoplayer/videostate.cpp
@@ -1,5 +1,7 @@
 #include "videostate.hpp"
 
+#include <iostream>
+
 #ifndef __STDC_CONSTANT_MACROS
 #define __STDC_CONSTANT_MACROS
 #endif