diff --git a/server/gameserver/constant.h b/server/gameserver/constant.h
index 10bfa7af..4a503769 100644
--- a/server/gameserver/constant.h
+++ b/server/gameserver/constant.h
@@ -433,6 +433,13 @@ enum BulletConsumeType_e
     kBulletConsumeMulti = 1,
 };
 
+enum SyncServerPosReason_e
+{
+    kPullbackReason = 0,
+    kNormalReason = 1,
+    kTrunOverReason = 2,
+};
+
 enum SamplePolyFlags
 {
     SAMPLE_POLYFLAGS_WALK                = 0x01,                // Ability to walk (ground, grass, road)