diff --git a/include/media/AudioPolicy.h b/include/media/AudioPolicy.h
index a171493..c769a62 100644
--- a/include/media/AudioPolicy.h
+++ b/include/media/AudioPolicy.h
@@ -97,6 +97,7 @@
 
 // definitions for audio recording configuration updates
 // which update type is reported
+#define RECORD_CONFIG_EVENT_NONE -1
 #define RECORD_CONFIG_EVENT_START 1
 #define RECORD_CONFIG_EVENT_STOP  0