diff --git a/source/arm11/acf.c b/source/arm11/acf.c
index a2ea37d..1fe9100 100644
--- a/source/arm11/acf.c
+++ b/source/arm11/acf.c
@@ -292,11 +292,12 @@ static int render_unicode(FHandle fd, int *x, unsigned width, unsigned height, u
     {
         for (int j = 0; j < bbx[0]; ++j)
         {
-            if( 0 <= i && i < (int)height && 0 <= j && j < (int)width )
+            int tx = cx+j, ty = cy-i;
+            if( 0 <= ty && ty < (int)height && 0 <= tx && tx < (int)width )
             {
                 if( BIT_AT_POS(glyph, bbx[0] * i + j) )
                 {
-                    SET_AT_POS( ram, PIX_IN_LINE(cx+j, cy-i, width) );
+                    SET_AT_POS( ram, PIX_IN_LINE(tx, ty, width) );
                 }
             }
         }