diff --git a/.travis.yml b/.travis.yml
index 694e742f..c54b3bd3 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,7 +1,7 @@
 language: node_js
 node_js:
 - stable
-- '5'
+- '6'
 - '4'
 sudo: false
 env:
diff --git a/src/path/Path.js b/src/path/Path.js
index 348d0572..ce9b5099 100644
--- a/src/path/Path.js
+++ b/src/path/Path.js
@@ -2848,7 +2848,7 @@ statics: {
             if (style.getStrokeJoin() === 'miter')
                 joinRadius = strokeRadius * style.getMiterLimit();
             if (style.getStrokeCap() === 'square')
-                joinRadius = Math.max(joinRadius, strokeRadius * Math.sqrt(2));
+                joinRadius = Math.max(joinRadius, strokeRadius * Math.SQRT2);
             strokePadding = Path._getStrokePadding(strokeRadius, strokeMatrix);
             joinPadding = Path._getStrokePadding(joinRadius, strokeMatrix);
         }
diff --git a/src/path/PathItem.js b/src/path/PathItem.js
index 1de2b798..557c36af 100644
--- a/src/path/PathItem.js
+++ b/src/path/PathItem.js
@@ -770,7 +770,7 @@ var PathItem = Item.extend(/** @lends PathItem# */{
      * @function
      *
      * @param {PathItem} path the path to compare this path's geometry with
-     * @return {Boolean} {@true if two paths describe the shame shape}
+     * @return {Boolean} {@true if two paths describe the same shape}
      */
     compare: function(path) {
         var ok = false;