diff --git a/services/audioflinger/AudioFlinger.h b/services/audioflinger/AudioFlinger.h
index e9e6e94..2d2da3e 100644
--- a/services/audioflinger/AudioFlinger.h
+++ b/services/audioflinger/AudioFlinger.h
@@ -24,6 +24,7 @@
 #include <deque>
 #include <map>
 #include <memory>
+#include <set>
 #include <string>
 #include <vector>
 #include <stdint.h>