diff --git a/grafproc.asm b/grafproc.asm
index 74d9600..3c1bbbd 100644
--- a/grafproc.asm
+++ b/grafproc.asm
@@ -34,9 +34,9 @@
 
     ; if line goes our of the screen we are not drawing it, but...
 
-    cpw xdraw #screenwidth+1
+    cpw xdraw #screenwidth
     bcs DrawOutOfTheScreen
-    cpw xbyte #screenwidth+1
+    cpw xbyte #screenwidth
     bcs DrawOutOfTheScreen
     ;cpw ydraw #screenheight
     ;bcs DrawOutOfTheScreen
diff --git a/scorch.xex b/scorch.xex
index 3f24fa6..86ce648 100644
Binary files a/scorch.xex and b/scorch.xex differ