diff --git a/src/gl/compatibility/gl_20.cpp b/src/gl/compatibility/gl_20.cpp
index 7e8ad093a..e059a3563 100644
--- a/src/gl/compatibility/gl_20.cpp
+++ b/src/gl/compatibility/gl_20.cpp
@@ -37,6 +37,7 @@
 **
 */
 #include "gl/system/gl_system.h"
+#include "menu/menu.h"
 #include "tarray.h"
 #include "doomtype.h"
 #include "m_argv.h"
@@ -63,7 +64,7 @@
 
 void gl_PatchMenu()
 {
-	if (gl.compatibility == CMPT_GL2)
+	if (gl.glslversion == 0)
 	{
 		// Radial fog and Doom lighting are not available in SM < 4 cards
 		// The way they are implemented does not work well on older hardware.
diff --git a/src/gl/scene/gl_scene.cpp b/src/gl/scene/gl_scene.cpp
index 23c7a6318..60227ccae 100644
--- a/src/gl/scene/gl_scene.cpp
+++ b/src/gl/scene/gl_scene.cpp
@@ -836,7 +836,7 @@ sector_t * FGLRenderer::RenderViewpoint (AActor * camera, GL_IRECT * bounds, flo
 		SetProjection( eye->GetProjection(fov, ratio, fovratio) );
 		// SetProjection(fov, ratio, fovratio);	// switch to perspective mode and set up clipper
 		SetViewAngle(ViewAngle);
-		// Stereo mode specific viewpoint adjustment - temporarily shifts global viewx, viewy, viewz
+		// Stereo mode specific viewpoint adjustment - temporarily shifts global ViewPos
 		eye->GetViewShift(GLRenderer->mAngles.Yaw.Degrees, viewShift);
 		s3d::ScopedViewShifter viewShifter(viewShift);
 		SetViewMatrix(ViewPos.X, ViewPos.Y, ViewPos.Z, false, false);
diff --git a/src/gl/stereo3d/scoped_view_shifter.cpp b/src/gl/stereo3d/scoped_view_shifter.cpp
index 5ecf1b0ab..f4274ed95 100644
--- a/src/gl/stereo3d/scoped_view_shifter.cpp
+++ b/src/gl/stereo3d/scoped_view_shifter.cpp
@@ -1,6 +1,6 @@
 /*
 ** scoped_view_shifter.cpp
-** Stack-scoped class for temporarily changing player viewpoint global variables viewx, viewy, viewz.
+** Stack-scoped class for temporarily changing camera viewpoint
 ** Used for stereoscopic 3D.
 **
 **---------------------------------------------------------------------------
diff --git a/src/gl/stereo3d/scoped_view_shifter.h b/src/gl/stereo3d/scoped_view_shifter.h
index 8e31cecdf..8e39d533b 100644
--- a/src/gl/stereo3d/scoped_view_shifter.h
+++ b/src/gl/stereo3d/scoped_view_shifter.h
@@ -1,6 +1,6 @@
 /*
 ** scoped_view_shifter.h
-** Stack-scoped class for temporarily changing player viewpoint global variables viewx, viewy, viewz.
+** Stack-scoped class for temporarily changing camera viewpoint
 ** Used for stereoscopic 3D.
 **
 **---------------------------------------------------------------------------
@@ -43,7 +43,7 @@
 namespace s3d {
 
 	/**
-	 * Temporarily shift viewx, viewy, viewz
+	 * Temporarily shift 
 	 */
 	class ScopedViewShifter
 	{