diff --git a/src/resize.js b/src/resize.js
index c8d87d9ded58f88c153d4b57a5fea93901f7e310..b88666f0dcf832cb95633ac0d715cdda77416a82 100644
--- a/src/resize.js
+++ b/src/resize.js
@@ -58,13 +58,13 @@ function resize_helper(sc)
     }
 
 
-    /* Xorg requires height be a multiple of 8; round up */
+    /* Xorg requires height be a multiple of 8; round down */
     if (h % 8 > 0)
-        h += (8 - (h % 8));
+        h -= (h % 8);
 
-    /* Xorg requires width be a multiple of 8; round up */
+    /* Xorg requires width be a multiple of 8; round down */
     if (w % 8 > 0)
-        w += (8 - (w % 8));
+        w -= (w % 8);
 
 
     sc.resize_window(0, w, h, 32, 0, 0);