diff --git a/source/gameengine/BlenderRoutines/BL_KetsjiEmbedStart.cpp b/source/gameengine/BlenderRoutines/BL_KetsjiEmbedStart.cpp
index 59c5888ff35..d9017c6a4ca 100644
--- a/source/gameengine/BlenderRoutines/BL_KetsjiEmbedStart.cpp
+++ b/source/gameengine/BlenderRoutines/BL_KetsjiEmbedStart.cpp
@@ -250,10 +250,12 @@ extern "C" void StartKetsjiShell(struct bContext *C, struct ARegion *ar, rcti *c
 
 		// some blender stuff
 		float camzoom;
+		int draw_letterbox = 0;
 		
 		if(rv3d->persp==RV3D_CAMOB) {
 			if(startscene->gm.framing.type == SCE_GAMEFRAMING_BARS) { /* Letterbox */
 				camzoom = 1.0f;
+				draw_letterbox = 1;
 			}
 			else {
 				camzoom = BKE_screen_view3d_zoom_to_fac(rv3d->camzoom);
@@ -428,12 +430,15 @@ extern "C" void StartKetsjiShell(struct bContext *C, struct ARegion *ar, rcti *c
 					// first check if we want to exit
 					exitrequested = ketsjiengine->GetExitCode();
 
-					// Clear screen to border color
-					// We do this here since we set the canvas to be within the frames. This means the engine
-					// itself is unaware of the extra space, so we clear the whole region for it.
-					glClearColor(scene->gm.framing.col[0], scene->gm.framing.col[1], scene->gm.framing.col[2], 1.0f);
-					glViewport(ar->winrct.xmin, ar->winrct.ymin, ar->winrct.xmax, ar->winrct.ymax);
-					glClear(GL_COLOR_BUFFER_BIT);
+					if(draw_letterbox) {
+						// Clear screen to border color
+						// We do this here since we set the canvas to be within the frames. This means the engine
+						// itself is unaware of the extra space, so we clear the whole region for it.
+						glClearColor(scene->gm.framing.col[0], scene->gm.framing.col[1], scene->gm.framing.col[2], 1.0f);
+						glViewport(ar->winrct.xmin, ar->winrct.ymin,
+							ar->winrct.xmax - ar->winrct.xmin, ar->winrct.ymax - ar->winrct.ymin);
+						glClear(GL_COLOR_BUFFER_BIT);
+					}
 					
 					// kick the engine
 					bool render = ketsjiengine->NextFrame();