diff --git a/src/pokemon.c b/src/pokemon.c
index 902d576f7..08a6fd0f9 100644
--- a/src/pokemon.c
+++ b/src/pokemon.c
@@ -5674,7 +5674,7 @@ u16 SpeciesToCryId(u16 species)
 
     The macro then loops over the 16x16 spot image. For each bit in the spot's binary image, if
     the bit is set then it's part of the spot; try to draw it. A pixel is drawn on Spinda if the
-    pixel on Spinda satisfies the following formula: (colorIndex - 1 <= 2). The -1 excludes
+    pixel on Spinda satisfies the following formula: ((u8)(colorIndex - 1) <= 2). The -1 excludes
     transparent pixels, as these are index 0. Therefore only colors 1, 2, or 3 on Spinda will
     allow a spot to be drawn. These color indexes are Spinda's light brown body colors. To create
     the spot it adds 4 to the color index, so Spinda's spots will be colors 5, 6, and 7.