diff --git a/library/src/main/java/com/bumptech/glide/load/resource/transcode/TranscoderRegistry.java b/library/src/main/java/com/bumptech/glide/load/resource/transcode/TranscoderRegistry.java
index 7802604115..7a595173ff 100644
--- a/library/src/main/java/com/bumptech/glide/load/resource/transcode/TranscoderRegistry.java
+++ b/library/src/main/java/com/bumptech/glide/load/resource/transcode/TranscoderRegistry.java
@@ -81,8 +81,8 @@ public synchronized <Z, R> List<Class<R>> getTranscodeClasses(
   }
 
   private static final class Entry<Z, R> {
-    private final Class<Z> fromClass;
-    private final Class<R> toClass;
+    @Synthetic final Class<Z> fromClass;
+    @Synthetic final Class<R> toClass;
     @Synthetic final ResourceTranscoder<Z, R> transcoder;
 
     Entry(