diff --git a/Makefile b/Makefile
index 86b05c96d..c6d47511e 100644
--- a/Makefile
+++ b/Makefile
@@ -180,6 +180,7 @@ gfx/pokedex/pokedex.2bpp: tools/gfx += --trim-whitespace
 gfx/pokedex/pokedex_sgb.2bpp: tools/gfx += --trim-whitespace
 gfx/pokedex/question_mark.2bpp: rgbgfx += -h
 gfx/pokedex/slowpoke.2bpp: tools/gfx += --trim-whitespace
+gfx/pokedex/question_mark.2bpp: rgbgfx += -h
 
 gfx/pokegear/pokegear.2bpp: rgbgfx += -x2
 gfx/pokegear/pokegear_sprites.2bpp: tools/gfx += --trim-whitespace