diff --git a/kotlin/admob/RewardedVideoExample/app/src/main/java/com/google/android/gms/example/rewardedvideoexample/MainActivity.kt b/kotlin/admob/RewardedVideoExample/app/src/main/java/com/google/android/gms/example/rewardedvideoexample/MainActivity.kt
index 04d9692ef..55085ad25 100644
--- a/kotlin/admob/RewardedVideoExample/app/src/main/java/com/google/android/gms/example/rewardedvideoexample/MainActivity.kt
+++ b/kotlin/admob/RewardedVideoExample/app/src/main/java/com/google/android/gms/example/rewardedvideoexample/MainActivity.kt
@@ -5,8 +5,10 @@ import android.os.CountDownTimer
 import android.view.View
 import android.widget.Toast
 import androidx.appcompat.app.AppCompatActivity
+import com.google.android.gms.ads.AdError
 import com.google.android.gms.ads.AdRequest
 import com.google.android.gms.ads.LoadAdError
+import com.google.android.gms.ads.MobileAds
 import com.google.android.gms.ads.rewarded.RewardItem
 import com.google.android.gms.ads.rewarded.RewardedAd
 import com.google.android.gms.ads.rewarded.RewardedAdCallback
@@ -151,7 +153,7 @@ class MainActivity : AppCompatActivity() {
             loadRewardedAd()
           }
 
-          override fun onRewardedAdFailedToLoad(adError: adError) {
+          override fun onRewardedAdFailedToShow(adError: AdError) {
             Toast.makeText(this@MainActivity, "onRewardedAdFailedToShow", Toast.LENGTH_LONG).show()
           }