diff --git a/extern/osgQt/CMakeLists.txt b/extern/osgQt/CMakeLists.txt
index e8a456da99..3bd08a390a 100644
--- a/extern/osgQt/CMakeLists.txt
+++ b/extern/osgQt/CMakeLists.txt
@@ -6,7 +6,6 @@ set(OSGQT_SOURCE_FILES
     GraphicsWindowQt.cpp
 )
 
-include_directories(${FFMPEG_INCLUDE_DIRS})
 add_library(${OSGQT_LIBRARY} STATIC ${OSGQT_SOURCE_FILES})
 
 if (DESIRED_QT_VERSION MATCHES 4)