diff --git a/services/audioflinger/AudioFlinger.h b/services/audioflinger/AudioFlinger.h
index 139fb4f..e49229e 100644
--- a/services/audioflinger/AudioFlinger.h
+++ b/services/audioflinger/AudioFlinger.h
@@ -533,6 +533,7 @@
     class AsyncCallbackThread;
     class Track;
     class RecordTrack;
+    class EffectBase;
     class EffectModule;
     class EffectHandle;
     class EffectChain;