diff --git a/Assets/Script/SDKManager/AdsSDKManager/AdmobAdsManager/AdmobNativeAdManager.cs b/Assets/Script/SDKManager/AdsSDKManager/AdmobAdsManager/AdmobNativeAdManager.cs
index 2a664e3..d3a2b1d 100644
--- a/Assets/Script/SDKManager/AdsSDKManager/AdmobAdsManager/AdmobNativeAdManager.cs
+++ b/Assets/Script/SDKManager/AdsSDKManager/AdmobAdsManager/AdmobNativeAdManager.cs
@@ -233,7 +233,8 @@ namespace WZ
                 // and anchored to the bottom of the screne.
                 ad.RenderTemplate(style, new AdSize(position.Width, position.Height), position.X, position.Y);
 
-                var showNativePosition = showingNativeAds[adUnitId];
+
+                var showNativePosition = showingNativeAds.GetValueOrDefault(adUnitId, null);
 
 
                 var lastAdResponseId = lastAd?.GetResponseInfo()?.GetResponseId();