diff --git a/QCamera2/stack/common/cam_types.h b/QCamera2/stack/common/cam_types.h
index 04a42b7..793de71 100644
--- a/QCamera2/stack/common/cam_types.h
+++ b/QCamera2/stack/common/cam_types.h
@@ -696,7 +696,8 @@
 
 typedef enum {
     CAM_AEC_TRIGGER_IDLE,
-    CAM_AEC_TRIGGER_START
+    CAM_AEC_TRIGGER_START,
+    CAM_AEC_TRIGGER_CANCEL
 } cam_aec_trigger_type_t;
 
 typedef enum {