diff --git a/engine/movie/credits.asm b/engine/movie/credits.asm
index 8420725f3..2d783b962 100644
--- a/engine/movie/credits.asm
+++ b/engine/movie/credits.asm
@@ -22,7 +22,10 @@ Credits::
 
 	ld hl, wCreditsBlankFrame2bpp
 	ld c, (wCreditsBlankFrame2bppEnd - wCreditsBlankFrame2bpp) / 2
-	ld de, `22222222 ; eight pixels, each with color #2
+	ld de, `22222222 ; eight pixels, each color #2 (dark)
+
+; Fill wCreditsBlankFrame2bpp with 4x4=16 tiles, all solid dark color
+; (the same color used for the four border frame mons' backgrounds)
 
 .load_loop
 	ld a, e
diff --git a/wram.asm b/wram.asm
index 481b201b9..73187f795 100644
--- a/wram.asm
+++ b/wram.asm
@@ -1069,7 +1069,7 @@ wc9f9:: ds 7
 
 UNION ; ca00
 ; blank credits tile buffer
-wCreditsBlankFrame2bpp:: ds 16 tiles
+wCreditsBlankFrame2bpp:: ds 4 * 4 tiles
 wCreditsBlankFrame2bppEnd::
 
 NEXTU ; ca00