diff --git a/src/js/parser/javascript/match_fragment.js b/src/js/parser/javascript/match_fragment.js
index ec7ee58..e58059e 100644
--- a/src/js/parser/javascript/match_fragment.js
+++ b/src/js/parser/javascript/match_fragment.js
@@ -9,11 +9,11 @@ export default {
         var anchor = this.content.anchor,
             matrix = this.transform().localMatrix;
 
-        return _.extend(anchor, {
+        return {
           ax: matrix.x(anchor.ax, anchor.ay),
           ax2: matrix.x(anchor.ax2, anchor.ay),
           ay: matrix.y(anchor.ax, anchor.ay)
-        });
+        };
       }
     }
   },
diff --git a/src/js/parser/javascript/subexp.js b/src/js/parser/javascript/subexp.js
index 8e4a56a..bc3c168 100644
--- a/src/js/parser/javascript/subexp.js
+++ b/src/js/parser/javascript/subexp.js
@@ -9,11 +9,11 @@ export default {
         var anchor = this.regexp.anchor,
             matrix = this.transform().localMatrix;
 
-        return _.extend(anchor, {
+        return {
           ax: matrix.x(anchor.ax, anchor.ay),
           ax2: matrix.x(anchor.ax2, anchor.ay),
           ay: matrix.y(anchor.ax, anchor.ay)
-        });
+        };
       }
     }
   },