diff --git a/app/static/coffees/main.coffee b/app/static/coffees/main.coffee
index c3a1198..d4e6a6a 100644
--- a/app/static/coffees/main.coffee
+++ b/app/static/coffees/main.coffee
@@ -48,7 +48,7 @@ $ ->
         $termtest.remove()
         w = $main.outerWidth()
         h = $main.outerHeight()
-        cols = Math.floor(w / ew)
+        cols = Math.floor(w / ew) - 1
         rows = Math.floor(h / eh)
         console.log "Computed #{cols} cols and #{rows} rows from main size #{w}, #{h} and div #{ew}, #{eh}"
         term.resize cols, rows
diff --git a/app/static/javascripts/main.js b/app/static/javascripts/main.js
index d462647..b0c8128 100644
--- a/app/static/javascripts/main.js
+++ b/app/static/javascripts/main.js
@@ -57,7 +57,7 @@ $(function() {
     $termtest.remove();
     w = $main.outerWidth();
     h = $main.outerHeight();
-    cols = Math.floor(w / ew);
+    cols = Math.floor(w / ew) - 1;
     rows = Math.floor(h / eh);
     console.log("Computed " + cols + " cols and " + rows + " rows from main size " + w + ", " + h + " and div " + ew + ", " + eh);
     term.resize(cols, rows);