diff --git a/addons/fit/fit.js b/addons/fit/fit.js
index 663a600b..f913d4ea 100644
--- a/addons/fit/fit.js
+++ b/addons/fit/fit.js
@@ -50,7 +50,7 @@
         subjectRow.innerHTML = contentBuffer;
 
         rows = parseInt(availableHeight / characterHeight);
-        cols = parseInt(availableWidth / characterWidth);
+        cols = parseInt(availableWidth / characterWidth) - 1;
 
         geometry = {cols: cols, rows: rows};
         return geometry;