diff --git a/viper.go b/viper.go
index e5a360a..d800395 100644
--- a/viper.go
+++ b/viper.go
@@ -1214,6 +1214,7 @@
 func (v *Viper) SetConfigName(in string) {
 	if in != "" {
 		v.configName = in
+		v.configFile = ""
 	}
 }
 
diff --git a/viper_test.go b/viper_test.go
index aa9d7fe..0c0c7e5 100644
--- a/viper_test.go
+++ b/viper_test.go
@@ -901,3 +901,9 @@
 
 	assert.Equal(t, &C, &config{Id: 1, FirstName: "Steve", Surname: "Owen"})
 }
+
+func TestSetConfigNameClearsFileCache(t *testing.T) {
+	SetConfigFile("/tmp/config.yaml")
+	SetConfigName("default")
+	assert.Empty(t, v.getConfigFile())
+}