diff --git a/viper.go b/viper.go
index 7b12b36..617cee6 100644
--- a/viper.go
+++ b/viper.go
@@ -459,8 +459,11 @@ func (v *Viper) getEnv(key string) (string, bool) {
 }
 
 // ConfigFileUsed returns the file used to populate the config registry.
-func ConfigFileUsed() string            { return v.ConfigFileUsed() }
-func (v *Viper) ConfigFileUsed() string { return v.configFile }
+func ConfigFileUsed() string { return v.ConfigFileUsed() }
+func (v *Viper) ConfigFileUsed() string {
+	f, _ := v.getConfigFile()
+	return f
+}
 
 // AddConfigPath adds a path for Viper to search for the config file in.
 // Can be called multiple times to define multiple search paths.
diff --git a/viper_test.go b/viper_test.go
index b8ceccb..fa1be9c 100644
--- a/viper_test.go
+++ b/viper_test.go
@@ -300,6 +300,25 @@ func (s *stringValue) String() string {
 	return string(*s)
 }
 
+func TestConfigFileUsed(t *testing.T) {
+	fs := afero.NewMemMapFs()
+
+	err := fs.Mkdir("/tmp/config", 0777)
+	require.NoError(t, err)
+
+	_, err = fs.Create("/tmp/config/myconfig.yaml")
+	require.NoError(t, err)
+
+	v := New()
+
+	v.SetFs(fs)
+	v.SetConfigName("myconfig")
+	v.AddConfigPath("/tmp/config")
+
+	filename := v.ConfigFileUsed()
+	assert.Equal(t, "/tmp/config/myconfig.yaml", filename)
+}
+
 func TestBasics(t *testing.T) {
 	SetConfigFile("/tmp/config.yaml")
 	filename, err := v.getConfigFile()