diff --git a/src/mame/video/amigaaga.c b/src/mame/video/amigaaga.c
index db1fde49ab4..62e3a1ace4f 100644
--- a/src/mame/video/amigaaga.c
+++ b/src/mame/video/amigaaga.c
@@ -845,7 +845,7 @@ void amiga_aga_render_scanline(running_machine *machine, bitmap_t *bitmap, int s
 
 			/* compute the pixel fetch parameters */
 			ddf_start_pixel = ( CUSTOM_REG(REG_DDFSTRT) & 0xfc ) * 2 + (hires ? 9 : 17);
-			ddf_stop_pixel = ( CUSTOM_REG(REG_DDFSTOP) & 0xfc ) * 2 + (hires ? (9 + defbitoffs - ((defbitoffs == 31) ? 16 : 0)) : (17 + defbitoffs));
+			ddf_stop_pixel = ( CUSTOM_REG(REG_DDFSTOP) & 0xfc ) * 2 + (hires ? (9 + defbitoffs - ((defbitoffs >= 31) ? 16 : 0)) : (17 + defbitoffs));
 
 			if ( ( CUSTOM_REG(REG_DDFSTRT) ^ CUSTOM_REG(REG_DDFSTOP) ) & 0x04 )
 				ddf_stop_pixel += 8;