diff --git a/RELEASENOTES.md b/RELEASENOTES.md
index ecee8de2f0..3746e3650d 100644
--- a/RELEASENOTES.md
+++ b/RELEASENOTES.md
@@ -37,6 +37,7 @@
         ([#7832](https://github.com/google/ExoPlayer/issues/7832)).
     *   Fix a bug that caused multiple ads in an ad pod to be skipped when one
         ad in the ad pod was skipped.
+    *   Fix passing an ads response to the `ImaAdsLoader` builder.
 
 ### 2.12.1 (2020-10-23) ###
 
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 852ab4e96a..2bd8e0c03d 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
@@ -458,7 +458,8 @@ public final class ImaAdsLoader
         adTagUri != null
             ? new DataSpec(adTagUri)
             : adsResponse != null
-                ? new DataSpec(Util.getDataUriForString(adsResponse, "text/xml"))
+                ? new DataSpec(
+                    Util.getDataUriForString(/* mimeType= */ "text/xml", /* data= */ adsResponse))
                 : null;
     adTagDataSpec = EMPTY_AD_TAG_DATA_SPEC;
     supportedMimeTypes = ImmutableList.of();