diff --git a/src/Magnum/Magnum.h b/src/Magnum/Magnum.h
index af6f1ba50..bae122d0c 100644
--- a/src/Magnum/Magnum.h
+++ b/src/Magnum/Magnum.h
@@ -462,7 +462,7 @@ class CubeMapTexture;
 class CubeMapTextureArray;
 #endif
 
-/* DebugMessage used only statically */
+/* DebugOutput, DebugMessage, DebugGroup used only statically */
 /* DefaultFramebuffer is available only through global instance */
 /* DimensionTraits forward declaration is not needed */