diff --git a/app/src/main/kotlin/com/tutpro/baresip/MainActivity.kt b/app/src/main/kotlin/com/tutpro/baresip/MainActivity.kt
index d3de33c6..e69350e8 100644
--- a/app/src/main/kotlin/com/tutpro/baresip/MainActivity.kt
+++ b/app/src/main/kotlin/com/tutpro/baresip/MainActivity.kt
@@ -69,6 +69,7 @@ class MainActivity : AppCompatActivity() {
     override fun onCreate(savedInstanceState: Bundle?) {
 
         super.onCreate(savedInstanceState)
+
         binding = ActivityMainBinding.inflate(layoutInflater)
 
         val intentAction = intent.getStringExtra("action")
@@ -479,6 +480,11 @@ class MainActivity : AppCompatActivity() {
 
         intent.removeExtra("action")
 
+        if (Preferences(applicationContext).displayTheme != AppCompatDelegate.getDefaultNightMode()) {
+            AppCompatDelegate.setDefaultNightMode(Preferences(applicationContext).displayTheme)
+            delegate.applyDayNight()
+        }
+
     } // OnCreate
 
     override fun onNewIntent(intent: Intent) {