diff --git a/gp2x/port_config.s b/gp2x/port_config.s
index 87c3e52..5a41036 100644
--- a/gp2x/port_config.s
+++ b/gp2x/port_config.s
@@ -3,11 +3,12 @@
 @ .equiv START_ROW,         1
 @ .equiv END_ROW,          27
 @ one row means 8 pixels. If above example was used, (27-1)*8=208 lines would be rendered.
-.equiv START_ROW,         0
-.equiv END_ROW,          28
+.equiv START_ROW,               0
+.equiv END_ROW,                28
 
-.equiv OVERRIDE_HIGHCOL,  0
+.equiv OVERRIDE_HIGHCOL,        0
+.equiv UNALIGNED_DRAWLINEDEST,  0
 
 @ this should be set to one only for GP2X port
-.equiv EXTERNAL_YM2612,   1
+.equiv EXTERNAL_YM2612,         1