diff --git a/src/mame/drivers/simpsons.c b/src/mame/drivers/simpsons.c
index 0ceb6dab6d4..2f91229f0fe 100644
--- a/src/mame/drivers/simpsons.c
+++ b/src/mame/drivers/simpsons.c
@@ -62,7 +62,7 @@ Custom ICs - 053260        - sound chip (QFP80)
              072G01 /
 
      VSync - 59.1856Hz
-     HSync - 15.1566Hz
+     HSync - 15.1566kHz
 
 ***************************************************************************/