diff --git a/include/config/overworld.h b/include/config/overworld.h
index cb110b4226..117d3b9eb5 100644
--- a/include/config/overworld.h
+++ b/include/config/overworld.h
@@ -133,6 +133,7 @@
 #define OW_POPUP_BW_TIME_MODE      OW_POPUP_BW_TIME_NONE    // Determines what type of time is shown.
 #define OW_POPUP_BW_ALPHA_BLEND    FALSE                    // Enables alpha blending/transparency for the pop-ups. Mainly intended to be used with the black color option.
                                                             // Setting this to TRUE will cause graphical errors with the Day Night System enabled.
+                                                            // It will also cause minor visual glitches of shadow and reflection sprites adjusting their transparency when the pop-up disappear
 
 // Pokémon Center
 #define OW_IGNORE_EGGS_ON_HEAL           GEN_LATEST         // In Gen 4+, the nurse in the Pokémon Center does not heal Eggs on healing machine.