diff --git a/extensions/flac/proguard-rules.txt b/extensions/flac/proguard-rules.txt
index 8e7f5e17d5..ee0a9fa5b5 100644
--- a/extensions/flac/proguard-rules.txt
+++ b/extensions/flac/proguard-rules.txt
@@ -5,7 +5,10 @@
     native <methods>;
 }
 
-# Some members of this class are being accessed from native methods. Keep them unobfuscated.
+# Some members of these classes are being accessed from native methods. Keep them unobfuscated.
 -keep class com.google.android.exoplayer2.ext.flac.FlacDecoderJni {
     *;
 }
+-keep class com.google.android.exoplayer2.util.FlacStreamInfo {
+    *;
+}