diff --git a/extensions/ima/src/main/java/com/google/android/exoplayer2/ext/ima/ImaAdsLoader.java b/extensions/ima/src/main/java/com/google/android/exoplayer2/ext/ima/ImaAdsLoader.java
index 15847d988a..7c095ff2ef 100644
--- a/extensions/ima/src/main/java/com/google/android/exoplayer2/ext/ima/ImaAdsLoader.java
+++ b/extensions/ima/src/main/java/com/google/android/exoplayer2/ext/ima/ImaAdsLoader.java
@@ -376,6 +376,9 @@ public final class ImaAdsLoader extends Player.DefaultEventListener implements A
     adDisplayContainer.setPlayer(this);
     if (imaSdkSettings == null) {
       imaSdkSettings = imaSdkFactory.createImaSdkSettings();
+      if (DEBUG) {
+        imaSdkSettings.setDebugMode(true);
+      }
     }
     imaSdkSettings.setPlayerType(IMA_SDK_SETTINGS_PLAYER_TYPE);
     imaSdkSettings.setPlayerVersion(IMA_SDK_SETTINGS_PLAYER_VERSION);