diff --git a/src/osgPlugins/OpenFlight/LightSourcePaletteManager.cpp b/src/osgPlugins/OpenFlight/LightSourcePaletteManager.cpp
index 1607281e3..4d3c74a7e 100644
--- a/src/osgPlugins/OpenFlight/LightSourcePaletteManager.cpp
+++ b/src/osgPlugins/OpenFlight/LightSourcePaletteManager.cpp
@@ -22,6 +22,7 @@
 #include <osg/Vec4f>
 #include <cassert>
 #include <sstream>
+#include <stdio.h>
 
 namespace flt
 {