diff --git a/src/b_game.cpp b/src/b_game.cpp
index 30c2c483b..807ec2b46 100644
--- a/src/b_game.cpp
+++ b/src/b_game.cpp
@@ -369,6 +369,7 @@ void FCajunMaster::DoAddBot (BYTE **stream)
 	{
 		multiplayer = true; //Prevents cheating and so on; emulates real netgame (almost).
 		players[bnum].Bot = new DBot;
+		GC::WriteBarrier (players[bnum].Bot);
 		players[bnum].Bot->skill = skill;
 		playeringame[bnum] = true;
 		players[bnum].mo = NULL;
diff --git a/src/p_user.cpp b/src/p_user.cpp
index 8980050e7..51105cd3d 100644
--- a/src/p_user.cpp
+++ b/src/p_user.cpp
@@ -3049,6 +3049,7 @@ void player_t::Serialize (FArchive &arc)
 	if (SaveVersion < 4514 && IsBot)
 	{
 		Bot = new DBot;
+		GC::WriteBarrier (Bot);
 
 		arc	<< Bot->angle
 			<< Bot->dest