diff --git a/lib/jasmine.js b/lib/jasmine.js
index 39d74abf..79be7472 100644
--- a/lib/jasmine.js
+++ b/lib/jasmine.js
@@ -1683,7 +1683,7 @@ jasmine.Spec.prototype.waitsFor = function(timeout, latchFunction, message) {
   return this;
 };
 
-jasmine.Spec.prototype.getMatchersClass_ = function(matcherPrototype) {
+jasmine.Spec.prototype.getMatchersClass_ = function() {
   return this.matchersClass || jasmine.Matchers;
 };
 
diff --git a/src/Spec.js b/src/Spec.js
index d5666609..3138da0b 100644
--- a/src/Spec.js
+++ b/src/Spec.js
@@ -81,7 +81,7 @@ jasmine.Spec.prototype.waitsFor = function(timeout, latchFunction, message) {
   return this;
 };
 
-jasmine.Spec.prototype.getMatchersClass_ = function(matcherPrototype) {
+jasmine.Spec.prototype.getMatchersClass_ = function() {
   return this.matchersClass || jasmine.Matchers;
 };