diff --git a/library/common/src/main/java/com/google/android/exoplayer2/source/TrackGroup.java b/library/common/src/main/java/com/google/android/exoplayer2/source/TrackGroup.java
index e6c1dc0376..1e75c6f443 100644
--- a/library/common/src/main/java/com/google/android/exoplayer2/source/TrackGroup.java
+++ b/library/common/src/main/java/com/google/android/exoplayer2/source/TrackGroup.java
@@ -27,6 +27,7 @@ import com.google.android.exoplayer2.C;
 import com.google.android.exoplayer2.Format;
 import com.google.android.exoplayer2.util.BundleableUtil;
 import com.google.android.exoplayer2.util.Log;
+import com.google.android.exoplayer2.util.MimeTypes;
 import com.google.common.collect.ImmutableList;
 import com.google.common.collect.Lists;
 import java.lang.annotation.Documented;