diff --git a/src/devctxt.c b/src/devctxt.c
index 2fd12a4..dc77110 100755
--- a/src/devctxt.c
+++ b/src/devctxt.c
@@ -57,27 +57,31 @@ static BOOL line_clip(PINT32 output, INT32 x1, INT32 y1, INT32 x2, INT32 y2, INT
 	}
 	if (outcode1 & 0x8)
 	{
-	  x1 += (x2 - x1) * ((ymin - y1) / (y2 - y1));
+	  tmp = (x2 - x1) * ((ymin - y1) / (y2 - y1));
+	  x1 += tmp;
 	  y1 = ymin;
-	  Log(LDEBUG, "clipped against top to point (%d, %d)", x1 >> 16, y1 >> 16);
+	  Log(LDEBUG, "clipped against top to point (%d, %d), dx=%d", x1 >> 16, y1 >> 16, tmp >> 16);
 	}
 	else if (outcode1 & 0x4)
 	{
-	  x1 += (x2 - x1) * ((ymax - y1) / (y2 - y1));
+	  tmp = (x2 - x1) * ((ymax - y1) / (y2 - y1));
+	  x1 += tmp;
 	  y1 = ymax;
-	  Log(LDEBUG, "clipped against bottom to point (%d, %d)", x1 >> 16, y1 >> 16);
+	  Log(LDEBUG, "clipped against bottom to point (%d, %d), dx=%d", x1 >> 16, y1 >> 16, tmp >> 16);
 	}
 	else if (outcode1 & 0x2)
 	{
-	  y1 -= (y2 - y1) * ((xmax - x1) / (x2 - x1));
+	  tmp = (y2 - y1) * ((xmax - x1) / (x2 - x1));
+	  y1 -= tmp;
 	  x1 = xmax;
-	  Log(LDEBUG, "clipped against right to point (%d, %d)", x1 >> 16, y1 >> 16);
+	  Log(LDEBUG, "clipped against right to point (%d, %d), dy=%d", x1 >> 16, y1 >> 16, tmp >> 16);
 	}
 	else if (outcode1 & 0x1)
 	{
-	  y1 -= (y2 - y1) * ((xmin - x1) / (x2 - x1));
+	  tmp = (y2 - y1) * ((xmin - x1) / (x2 - x1));
+	  y1 -= tmp;
 	  x1 = xmin;
-	  Log(LDEBUG, "clipped against left to point (%d, %d)", x1 >> 16, y1 >> 16);
+	  Log(LDEBUG, "clipped against left to point (%d, %d), dy=%d", x1 >> 16, y1 >> 16, tmp >> 16);
 	}
   }
   Log(LDEBUG, "final line is from (%d, %d) to (%d, %d)", x1 >> 16, y1 >> 16, x2 >> 16, y2 >> 16);