diff --git a/services/oboeservice/SharedRingBuffer.cpp b/services/oboeservice/SharedRingBuffer.cpp
index efcc9d6..03c160d 100644
--- a/services/oboeservice/SharedRingBuffer.cpp
+++ b/services/oboeservice/SharedRingBuffer.cpp
@@ -18,6 +18,8 @@
 //#define LOG_NDEBUG 0
 #include <utils/Log.h>
 
+#include <sys/mman.h>
+
 #include "binding/RingBufferParcelable.h"
 #include "binding/AudioEndpointParcelable.h"