diff --git a/src/mame/video/namcos22.c b/src/mame/video/namcos22.c
index fd93d5e96e1..de7bda437e9 100644
--- a/src/mame/video/namcos22.c
+++ b/src/mame/video/namcos22.c
@@ -8,7 +8,7 @@
  * - texture u/v mapping is often 1 pixel off, resulting in many glitch lines/gaps between textures
  * - tokyowar tanks are not shootable, same for timecris helicopter, there's still a very small hitbox but almost impossible to hit
  *       (is this related to dsp? or cpu?)
- * - no sprites shown in dirtdash
+ * - no sprites shown in dirtdash: looks like the same issue as airco22b: find out how/where vics num_sprites is determined exactly
  * - eliminate sprite garbage in airco22b: find out how/where vics num_sprites is determined exactly, or is it linktable related?
  * - window clipping (acedrvrw, victlapw)
  * - using rgbint to set brightness may cause problems if a color channel is 00 (eg. victlapw attract)