diff --git a/src/evaluator.js b/src/evaluator.js
index b70a0db50..f6228ef18 100644
--- a/src/evaluator.js
+++ b/src/evaluator.js
@@ -1030,20 +1030,16 @@ var PartialEvaluator = (function PartialEvaluatorClosure() {
 
         var widths = dict.get('W');
         if (widths) {
-          var start = 0, end = 0;
           for (var i = 0, ii = widths.length; i < ii; i++) {
+            var start = widths[i++];
             var code = xref.fetchIfRef(widths[i]);
             if (isArray(code)) {
               for (var j = 0, jj = code.length; j < jj; j++)
                 glyphsWidths[start++] = code[j];
-              start = 0;
-            } else if (start) {
+            } else {
               var width = widths[++i];
               for (var j = start; j <= code; j++)
                 glyphsWidths[j] = width;
-              start = 0;
-            } else {
-              start = code;
             }
           }
         }