diff --git a/include/audiomanager/AudioManager.h b/include/audiomanager/AudioManager.h
index 009dc52..639df7a 100644
--- a/include/audiomanager/AudioManager.h
+++ b/include/audiomanager/AudioManager.h
@@ -20,7 +20,6 @@
 namespace android {
 
 // must be kept in sync with definitions in AudioPlaybackConfiguration.java
-
 #define PLAYER_PIID_INVALID -1
 
 typedef enum {
@@ -40,6 +39,15 @@
     PLAYER_STATE_STOPPED  = 4,
 } player_state_t;
 
+// must be kept in sync with definitions in AudioManager.java
+#define RECORD_RIID_INVALID -1
+
+typedef enum {
+    RECORDER_STATE_UNKNOWN  = -1,
+    RECORDER_STATE_STARTED  = 0,
+    RECORDER_STATE_STOPPED  = 1,
+} recorder_state_t;
+
 }; // namespace android
 
 #endif // ANDROID_AUDIOMANAGER_H