diff --git a/RELEASENOTES.md b/RELEASENOTES.md
index 8023cf78da3..9500d3cfefb 100644
--- a/RELEASENOTES.md
+++ b/RELEASENOTES.md
@@ -113,6 +113,8 @@
   `MediaCodecRenderer`, and provide an (optional) `MediaCodecSelector` that
   falls back to less preferred decoders like `MediaCodec.createDecoderByType`
   ([#273](https://github.com/google/ExoPlayer/issues/273)).
+* Enable gzip for requests made by `SingleSampleMediaSource`
+  ([#4771](https://github.com/google/ExoPlayer/issues/4771)).
 * Fix bug reporting buffered position for multi-period windows, and add
   convenience methods `Player.getTotalBufferedDuration` and
   `Player.getContentBufferedDuration`
diff --git a/library/core/src/main/java/com/google/android/exoplayer2/source/SingleSampleMediaSource.java b/library/core/src/main/java/com/google/android/exoplayer2/source/SingleSampleMediaSource.java
index dc46b12b2ea..1ac62074540 100644
--- a/library/core/src/main/java/com/google/android/exoplayer2/source/SingleSampleMediaSource.java
+++ b/library/core/src/main/java/com/google/android/exoplayer2/source/SingleSampleMediaSource.java
@@ -287,7 +287,8 @@ private SingleSampleMediaSource(
     this.durationUs = durationUs;
     this.loadErrorHandlingPolicy = loadErrorHandlingPolicy;
     this.treatLoadErrorsAsEndOfStream = treatLoadErrorsAsEndOfStream;
-    dataSpec = new DataSpec(uri);
+    dataSpec =
+        new DataSpec(uri, DataSpec.FLAG_ALLOW_GZIP | DataSpec.FLAG_ALLOW_CACHING_UNKNOWN_LENGTH);
     timeline =
         new SinglePeriodTimeline(durationUs, /* isSeekable= */ true, /* isDynamic= */ false, tag);
   }