diff --git a/parts/player/init.lua b/parts/player/init.lua
index f5cd63ce..d109f719 100644
--- a/parts/player/init.lua
+++ b/parts/player/init.lua
@@ -410,6 +410,7 @@ function PLY.newRemotePlayer(id,mini,p)
     P.uid=p.uid
     P.sid=NET.uid_sid[p.uid]
     P.group=p.group
+    P.netAtk=0
     if not (P.group%1==0 and P.group>=1 and P.group<=6) then P.group=0 end
 
     _loadRemoteEnv(P,p.config)
diff --git a/parts/player/player.lua b/parts/player/player.lua
index 07e4d40a..6c1eb752 100644
--- a/parts/player/player.lua
+++ b/parts/player/player.lua
@@ -2605,6 +2605,13 @@ local function update_streaming(P)
             local line=int(event/0x100000000)%0x10000
             for _,p in next,PLY_ALIVE do
                 if p.sid==sid then
+                    P.netAtk=P.netAtk+amount
+                    if P.netAtk~=P.stat.atk then
+                        MES.new('warn',"#"..P.uid..' desynchronized')
+                        NET.player_finish({foo=""})
+                        P:lose(true)
+                        return
+                    end
                     P:attack(p,amount,time,line,true)
                     P:createBeam(p,amount)
                     break