diff --git a/js/id/svg/labels.js b/js/id/svg/labels.js
index 7256e223a..ac558179c 100644
--- a/js/id/svg/labels.js
+++ b/js/id/svg/labels.js
@@ -80,7 +80,12 @@ iD.svg.Labels = function(projection, context) {
             return c[text];
 
         } else {
-            return size / 3 * 2 * text.length;
+            var str = encodeURIComponent(text).match(/%[CDEFcdef]/g);
+            if (str === null) {
+                return size / 3 * 2 * text.length;
+            } else {
+                return size / 3 * (2 * text.length + str.length);
+            }
         }
     }