diff --git a/applications/osgviewer/osgviewer.cpp b/applications/osgviewer/osgviewer.cpp
index 0977a4ec6..902be3429 100644
--- a/applications/osgviewer/osgviewer.cpp
+++ b/applications/osgviewer/osgviewer.cpp
@@ -31,6 +31,7 @@
 #include <osgGA/Device>
 
 #include <iostream>
+#include <stdint.h>
 
 #include <osg/GLExtensions>
 
@@ -90,7 +91,7 @@ public:
         if (!_extensionInitialized) setUpExtensions();
 
         if (_glClientWaitSync)
-        {        
+        {
             if (_previousSync)
             {
                 unsigned int num_seconds = 1;
@@ -126,7 +127,7 @@ public:
     typedef void (GL_APIENTRY * PFNGLGETSYNCIVPROC) (GLsync sync, GLenum pname, GLsizei bufSize, GLsizei *length, GLint *values);
 
     bool                        _extensionInitialized;
-    
+
     PFNGLFENCESYNCPROC          _glFenceSync;
     PFNGLISSYNCPROC             _glIsSync;
     PFNGLDELETESYNCPROC         _glDeleteSync;
@@ -187,7 +188,7 @@ int main(int argc, char** argv)
             );
         }
     }
-    
+
     std::string device;
     while(arguments.read("--device", device))
     {