diff --git a/native_client_sdk/src/libraries/ppapi/library.dsc b/native_client_sdk/src/libraries/ppapi/library.dsc
index a4a79746b2efcb..a1e1b1b29dc196 100644
--- a/native_client_sdk/src/libraries/ppapi/library.dsc
+++ b/native_client_sdk/src/libraries/ppapi/library.dsc
@@ -99,6 +99,7 @@
       'FILES': [
         'deprecated_bool.h',
         'ppb_cursor_control_dev.h',
+        'ppb_device_ref_dev.h',
         'ppb_file_chooser_dev.h',
         'ppb_memory_dev.h',
         'ppb_opengles2ext_dev.h',
diff --git a/ppapi/api/dev/ppb_device_ref_dev.idl b/ppapi/api/dev/ppb_device_ref_dev.idl
index b6135843bf7665..bcc6ce360a46c2 100644
--- a/ppapi/api/dev/ppb_device_ref_dev.idl
+++ b/ppapi/api/dev/ppb_device_ref_dev.idl
@@ -37,7 +37,8 @@ enum PP_DeviceType_Dev {
   PP_DEVICETYPE_DEV_INVALID = 0,
   PP_DEVICETYPE_DEV_AUDIOCAPTURE = 1,
   PP_DEVICETYPE_DEV_VIDEOCAPTURE = 2,
-  PP_DEVICETYPE_DEV_AUDIOOUTPUT = 3
+  PP_DEVICETYPE_DEV_AUDIOOUTPUT = 3,
+  PP_DEVICETYPE_DEV_MAX = PP_DEVICETYPE_DEV_AUDIOOUTPUT
 };
 
 interface PPB_DeviceRef_Dev {
diff --git a/ppapi/c/dev/ppb_device_ref_dev.h b/ppapi/c/dev/ppb_device_ref_dev.h
index 2b8b18d0fa3192..ff36d121e56e52 100644
--- a/ppapi/c/dev/ppb_device_ref_dev.h
+++ b/ppapi/c/dev/ppb_device_ref_dev.h
@@ -56,7 +56,8 @@ typedef enum {
   PP_DEVICETYPE_DEV_INVALID = 0,
   PP_DEVICETYPE_DEV_AUDIOCAPTURE = 1,
   PP_DEVICETYPE_DEV_VIDEOCAPTURE = 2,
-  PP_DEVICETYPE_DEV_AUDIOOUTPUT = 3
+  PP_DEVICETYPE_DEV_AUDIOOUTPUT = 3,
+  PP_DEVICETYPE_DEV_MAX = PP_DEVICETYPE_DEV_AUDIOOUTPUT
 } PP_DeviceType_Dev;
 PP_COMPILE_ASSERT_SIZE_IN_BYTES(PP_DeviceType_Dev, 4);
 /**
diff --git a/ppapi/proxy/ppapi_messages.h b/ppapi/proxy/ppapi_messages.h
index 67e61b70ed8014..263c383bf1b06b 100644
--- a/ppapi/proxy/ppapi_messages.h
+++ b/ppapi/proxy/ppapi_messages.h
@@ -98,7 +98,7 @@ IPC_ENUM_TRAITS_MAX_VALUE(PP_BlendMode, PP_BLENDMODE_LAST)
 IPC_ENUM_TRAITS_MAX_VALUE(PP_CdmExceptionCode, PP_CDMEXCEPTIONCODE_MAX)
 IPC_ENUM_TRAITS_MAX_VALUE(PP_CdmKeyStatus, PP_CDMKEYSTATUS_MAX)
 IPC_ENUM_TRAITS_MAX_VALUE(PP_CdmMessageType, PP_CDMMESSAGETYPE_MAX)
-IPC_ENUM_TRAITS(PP_DeviceType_Dev)
+IPC_ENUM_TRAITS_MAX_VALUE(PP_DeviceType_Dev, PP_DEVICETYPE_DEV_MAX)
 IPC_ENUM_TRAITS_MAX_VALUE(PP_DecryptorStreamType, PP_DECRYPTORSTREAMTYPE_MAX)
 IPC_ENUM_TRAITS_MAX_VALUE(PP_FileSystemType, PP_FILESYSTEMTYPE_ISOLATED)
 IPC_ENUM_TRAITS_MAX_VALUE(PP_FileType, PP_FILETYPE_OTHER)