diff --git a/lib/mock-ajax.js b/lib/mock-ajax.js
index d622aad..7939669 100644
--- a/lib/mock-ajax.js
+++ b/lib/mock-ajax.js
@@ -259,14 +259,19 @@ WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
   }
 
   function RequestStub(url, stubData) {
-    var split = url.split('?');
-    this.url = split[0];
-
     var normalizeQuery = function(query) {
       return query ? query.split('&').sort().join('&') : undefined;
     };
 
-    this.query = normalizeQuery(split[1]);
+    if (url instanceof RegExp) {
+      this.url = url;
+      this.query = undefined;
+    } else {
+      var split = url.split('?');
+      this.url = split[0];
+      this.query = split.length > 1 ? normalizeQuery(split[1]) : undefined;
+    }
+
     this.data = normalizeQuery(stubData);
 
     this.andReturn = function(options) {
@@ -277,10 +282,17 @@ WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
     };
 
     this.matches = function(fullUrl, data) {
-      var urlSplit = fullUrl.split('?'),
-          url = urlSplit[0],
-          query = urlSplit[1];
-      return this.url === url && this.query === normalizeQuery(query) && (!this.data || this.data === normalizeQuery(data));
+      var matches = false;
+      fullUrl = fullUrl.toString();
+      if (this.url instanceof RegExp) {
+        matches = this.url.test(fullUrl);
+      } else {
+        var urlSplit = fullUrl.split('?'),
+            url = urlSplit[0],
+            query = urlSplit[1];
+        matches = this.url === url && this.query === normalizeQuery(query);
+      }
+      return matches && (!this.data || this.data === normalizeQuery(data));
     };
   }
 
@@ -292,4 +304,3 @@ WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
     jasmine.Ajax = new MockAjax(window);
   }
 }());
-
diff --git a/spec/javascripts/webmock-style-spec.js b/spec/javascripts/webmock-style-spec.js
index 425d72e..f99830e 100644
--- a/spec/javascripts/webmock-style-spec.js
+++ b/spec/javascripts/webmock-style-spec.js
@@ -77,6 +77,14 @@ describe("Webmock style mocking", function() {
     });
   });
 
+  it("allows stubs to use RegExp", function () {
+    mockAjax.stubRequest(/thisGuy/).andReturn({responseText: 'regex', status: 200});
+
+    sendRequest(fakeGlobal, 'http://www.example.com/thisGuy/thatGuy');
+    expect(successSpy).toHaveBeenCalled();
+    expect(response.responseText).toBe('regex');
+  });
+
   describe("stubbing with form data", function() {
     beforeEach(function() {
       mockAjax.stubRequest("http://example.com/someApi", 'foo=bar&baz=quux').andReturn({responseText: "form", status: 201});