diff --git a/simgear/screen/RenderTexture.cpp b/simgear/screen/RenderTexture.cpp
index f27813f9..f45234c7 100644
--- a/simgear/screen/RenderTexture.cpp
+++ b/simgear/screen/RenderTexture.cpp
@@ -1,4 +1,4 @@
-//---------------------------------------------------------------------------
+reateContext//
 // File : RenderTexture.cpp
 //---------------------------------------------------------------------------
 // Copyright (c) 2002-2004 Mark J. Harris
@@ -494,7 +494,7 @@ bool RenderTexture::Initialize(int width, int height,
 
                 _hGLContext = glXCreateContextPtr(_pDisplay, visInfo,
                                                _bShareObjects ? context : NULL,
-                                               GL_TRUE);
+                                               True);
                 if (!_hGLContext)
                 {
                     return false;
diff --git a/simgear/screen/TestRenderTexture.cpp b/simgear/screen/TestRenderTexture.cpp
index 8b018cb8..2f2d1cf9 100644
--- a/simgear/screen/TestRenderTexture.cpp
+++ b/simgear/screen/TestRenderTexture.cpp
@@ -305,8 +305,10 @@ void _Display()
 // Function     	: main
 // Description	    : 
 //---------------------------------------------------------------------------
-int main()
+int main(int argc, char *argv[])
 {
+    int argn = argc;
+    glutInit(&argn, argv);
     glutInitDisplayMode(GLUT_RGB | GLUT_DEPTH | GLUT_DOUBLE);
     glutInitWindowPosition(50, 50);
     glutInitWindowSize(512, 512);