diff --git a/services/audioflinger/Threads.cpp b/services/audioflinger/Threads.cpp
index 90b59b3..6302fc4 100644
--- a/services/audioflinger/Threads.cpp
+++ b/services/audioflinger/Threads.cpp
@@ -116,6 +116,8 @@
 
 namespace android {
 
+using media::IEffectClient;
+
 // retry counts for buffer fill timeout
 // 50 * ~20msecs = 1 second
 static const int8_t kMaxTrackRetries = 50;