diff --git a/samples/opengl/cube/cube.cpp b/samples/opengl/cube/cube.cpp
index 76e7466a9f..cda5cca761 100644
--- a/samples/opengl/cube/cube.cpp
+++ b/samples/opengl/cube/cube.cpp
@@ -138,6 +138,7 @@ TestGLContext::TestGLContext(wxGLCanvas *canvas)
     SetCurrent(*canvas);
 
     // set up the parameters we want to use
+    glEnable(GL_CULL_FACE);
     glEnable(GL_DEPTH_TEST);
     glEnable(GL_LIGHTING);
     glEnable(GL_LIGHT0);
diff --git a/samples/opengl/penguin/penguin.cpp b/samples/opengl/penguin/penguin.cpp
index b461b79df0..b60619ed77 100644
--- a/samples/opengl/penguin/penguin.cpp
+++ b/samples/opengl/penguin/penguin.cpp
@@ -276,7 +276,7 @@ void TestGLCanvas::InitGL()
     static const GLfloat light1_color[4] = { 0.4f, 0.4f, 1.0f, 1.0f };
 
     /* remove back faces */
-    glDisable(GL_CULL_FACE);
+    glEnable(GL_CULL_FACE);
     glEnable(GL_DEPTH_TEST);
 
     /* speedups */