diff --git a/talksapp/main.go b/talksapp/main.go
index 71b8943..d104455 100644
--- a/talksapp/main.go
+++ b/talksapp/main.go
@@ -39,7 +39,7 @@
 
 	// used for mocking in tests
 	getPresentation = gosrc.GetPresentation
-	playCompileUrl  = "http://play.golang.org/compile"
+	playCompileURL  = "http://play.golang.org/compile"
 )
 
 func init() {
@@ -226,7 +226,7 @@
 	if err := r.ParseForm(); err != nil {
 		return err
 	}
-	resp, err := client.PostForm(playCompileUrl, r.Form)
+	resp, err := client.PostForm(playCompileURL, r.Form)
 	if err != nil {
 		return err
 	}
diff --git a/talksapp/main_test.go b/talksapp/main_test.go
index b91ec8a..3d377d0 100644
--- a/talksapp/main_test.go
+++ b/talksapp/main_test.go
@@ -170,8 +170,8 @@
 	)
 	defer server.Close()
 
-	defer func(old string) { playCompileUrl = old }(playCompileUrl)
-	playCompileUrl = server.URL
+	defer func(old string) { playCompileURL = old }(playCompileURL)
+	playCompileURL = server.URL
 
 	do(t, "POST", "/compile", func(r *http.Request) {
 		r.PostForm = url.Values{