diff --git a/effects/cube.cpp b/effects/cube.cpp
index 222b3ceb31..5943fb75bd 100644
--- a/effects/cube.cpp
+++ b/effects/cube.cpp
@@ -131,7 +131,7 @@ CubeEffect::CubeEffect()
                 }
             capTexture = new GLTexture( img );
             capTexture->setFilter( GL_LINEAR );
-            capTexture->setWrapMode( GL_CLAMP );
+            capTexture->setWrapMode( GL_CLAMP_TO_EDGE );
             }
         }