diff --git a/arch/m68k/mac/debug.c b/arch/m68k/mac/debug.c
index 7a5bed5bdc57..e8a57138b4a6 100644
--- a/arch/m68k/mac/debug.c
+++ b/arch/m68k/mac/debug.c
@@ -71,7 +71,7 @@ void mac_debugging_short(int pos, short num)
 
 	/* calculate current offset */
 	pengoffset = (unsigned char *)mac_videobase +
-		(150+line*2) * mac_rowbytes) + 80 * peng;
+		(150+line*2) * mac_rowbytes + 80 * peng;
 
 	pptr = pengoffset;