diff --git a/src/p_saveg.c b/src/p_saveg.c
index d1ec8e5ab..6e0c704f6 100644
--- a/src/p_saveg.c
+++ b/src/p_saveg.c
@@ -950,6 +950,7 @@ typedef enum
 	tc_bouncecheese,
 	tc_startcrumble,
 	tc_marioblock,
+	tc_marioblockchecker,
 	tc_spikesector,
 	tc_floatsector,
 	tc_bridgethinker,
@@ -1774,6 +1775,11 @@ static void P_NetArchiveThinkers(void)
 			SaveSpecialLevelThinker(th, tc_marioblock);
 			continue;
 		}
+		else if (th->function.acp1 == (actionf_p1)T_MarioBlockChecker)
+		{
+			SaveSpecialLevelThinker(th, tc_marioblockchecker);
+			continue;
+		}
 		else if (th->function.acp1 == (actionf_p1)T_SpikeSector)
 		{
 			SaveSpecialLevelThinker(th, tc_spikesector);
@@ -2730,6 +2736,10 @@ static void P_NetUnArchiveThinkers(void)
 				LoadSpecialLevelThinker((actionf_p1)T_MarioBlock, 3);
 				break;
 
+			case tc_marioblockchecker:
+				LoadSpecialLevelThinker((actionf_p1)T_MarioBlockChecker, 0);
+				break;
+
 			case tc_spikesector:
 				LoadSpecialLevelThinker((actionf_p1)T_SpikeSector, 0);
 				break;