diff --git a/libraries/exoplayer/src/main/java/androidx/media3/exoplayer/drm/DrmUtil.java b/libraries/exoplayer/src/main/java/androidx/media3/exoplayer/drm/DrmUtil.java
index 8677670ce5..a1c741e541 100644
--- a/libraries/exoplayer/src/main/java/androidx/media3/exoplayer/drm/DrmUtil.java
+++ b/libraries/exoplayer/src/main/java/androidx/media3/exoplayer/drm/DrmUtil.java
@@ -142,15 +142,17 @@ public final class DrmUtil {
   }
 
   /**
-   * Executes a Http Post Request to the supplied {@link StatsDataSource} with retry handling and
-   * returns the entire response in a byte buffer.
+   * Executes a HTTP POST request with retry handling and returns the entire response in a byte
+   * buffer.
    *
-   * @param dataSource A {@link DataSource} that is usually HTTP-based
-   * @param url The requesting url
-   * @param httpBody The http request payload
-   * @param requestProperties A keyed map of http header request properties
-   * @return A byte array that holds the response payload
-   * @throws MediaDrmCallbackException if an exception was encountered during the download
+   * <p>Note that this method is executing the request synchronously and blocks until finished.
+   *
+   * @param dataSource A {@link DataSource}.
+   * @param url The requested URL.
+   * @param httpBody The HTTP request payload.
+   * @param requestProperties A keyed map of HTTP header request properties.
+   * @return A byte array that holds the response payload.
+   * @throws MediaDrmCallbackException if an exception was encountered during the download.
    */
   public static byte[] executePost(
       DataSource dataSource,
diff --git a/libraries/exoplayer/src/main/java/androidx/media3/exoplayer/drm/HttpMediaDrmCallback.java b/libraries/exoplayer/src/main/java/androidx/media3/exoplayer/drm/HttpMediaDrmCallback.java
index 76130aabb9..37f76cd242 100644
--- a/libraries/exoplayer/src/main/java/androidx/media3/exoplayer/drm/HttpMediaDrmCallback.java
+++ b/libraries/exoplayer/src/main/java/androidx/media3/exoplayer/drm/HttpMediaDrmCallback.java
@@ -26,7 +26,6 @@ import androidx.media3.common.util.UnstableApi;
 import androidx.media3.common.util.Util;
 import androidx.media3.datasource.DataSource;
 import androidx.media3.datasource.DataSpec;
-import androidx.media3.datasource.StatsDataSource;
 import androidx.media3.exoplayer.drm.ExoMediaDrm.KeyRequest;
 import androidx.media3.exoplayer.drm.ExoMediaDrm.ProvisionRequest;
 import com.google.common.collect.ImmutableMap;
@@ -157,8 +156,7 @@ public final class HttpMediaDrmCallback implements MediaDrmCallback {
     return executePost(
         dataSourceFactory.createDataSource(),
         url,
-        request.getData(),
-        requestProperties
-    );
+        /* httpBody= */ request.getData(),
+        requestProperties);
   }
 }