diff --git a/source/blender/render/intern/source/pipeline.c b/source/blender/render/intern/source/pipeline.c
index 052ce40fdb3..20935a42ac8 100644
--- a/source/blender/render/intern/source/pipeline.c
+++ b/source/blender/render/intern/source/pipeline.c
@@ -2096,6 +2096,11 @@ static int is_rendering_allowed(Render *re)
 		return 0;
 	}
 	
+	/* renderer */
+	if(!ELEM(re->r.renderer, R_INTERN, R_YAFRAY)) {
+		re->error("Unknown render engine set");
+		return 0;
+	}
 	return 1;
 }