diff --git a/src/actor.h b/src/actor.h
index 768008182..d06e968f7 100644
--- a/src/actor.h
+++ b/src/actor.h
@@ -837,6 +837,7 @@ public:
 	DWORD			flags4;			// [RH] Even more flags!
 	DWORD			flags5;			// OMG! We need another one.
 	DWORD			flags6;			// Shit! Where did all the flags go?
+	DWORD			flags7;			// 
 
 	// [BB] If 0, everybody can see the actor, if > 0, only members of team (VisibleToTeam-1) can see it.
 	DWORD			VisibleToTeam;
diff --git a/src/m_cheat.cpp b/src/m_cheat.cpp
index 07c467bac..5d9d48bea 100644
--- a/src/m_cheat.cpp
+++ b/src/m_cheat.cpp
@@ -311,6 +311,7 @@ void cht_DoCheat (player_t *player, int cheat)
 				player->mo->flags4 = player->mo->GetDefault()->flags4;
 				player->mo->flags5 = player->mo->GetDefault()->flags5;
 				player->mo->flags6 = player->mo->GetDefault()->flags6;
+				player->mo->flags7 = player->mo->GetDefault()->flags7;
 				player->mo->renderflags &= ~RF_INVISIBLE;
 				player->mo->height = player->mo->GetDefault()->height;
 				player->mo->radius = player->mo->GetDefault()->radius;
diff --git a/src/p_enemy.cpp b/src/p_enemy.cpp
index 81a58ac15..5df2b4b5e 100644
--- a/src/p_enemy.cpp
+++ b/src/p_enemy.cpp
@@ -2644,6 +2644,7 @@ static bool P_CheckForResurrection(AActor *self, bool usevilestates)
 			corpsehit->flags4 = info->flags4;
 			corpsehit->flags5 = info->flags5;
 			corpsehit->flags6 = info->flags6;
+			corpsehit->flags7 = info->flags7;
 			corpsehit->health = info->health;
 			corpsehit->target = NULL;
 			corpsehit->lastenemy = NULL;
diff --git a/src/p_mobj.cpp b/src/p_mobj.cpp
index 14607a682..34100c935 100644
--- a/src/p_mobj.cpp
+++ b/src/p_mobj.cpp
@@ -200,8 +200,12 @@ void AActor::Serialize (FArchive &arc)
 		<< flags3
 		<< flags4
 		<< flags5
-		<< flags6
-		<< special1
+		<< flags6;
+	if (SaveVersion >= 4504)
+	{
+		arc << flags7;
+	}
+	arc	<< special1
 		<< special2
 		<< health
 		<< movedir
@@ -6133,6 +6137,9 @@ void PrintMiscActorInfo(AActor *query)
 		Printf("\n\tflags6: %x", query->flags6);
 		for (flagi = 0; flagi <= 31; flagi++)
 			if (query->flags6 & 1<<flagi) Printf(" %s", FLAG_NAME(1<<flagi, flags6));
+		Printf("\n\tflags7: %x", query->flags7);
+		for (flagi = 0; flagi <= 31; flagi++)
+			if (query->flags7 & 1<<flagi) Printf(" %s", FLAG_NAME(1<<flagi, flags7));
 		Printf("\nBounce flags: %x\nBounce factors: f:%f, w:%f", 
 			query->BounceFlags, FIXED2FLOAT(query->bouncefactor), 
 			FIXED2FLOAT(query->wallbouncefactor));
diff --git a/src/p_things.cpp b/src/p_things.cpp
index a0f905a7f..4828e8cbc 100644
--- a/src/p_things.cpp
+++ b/src/p_things.cpp
@@ -452,6 +452,7 @@ bool P_Thing_Raise(AActor *thing)
 	thing->flags4 = info->flags4;
 	thing->flags5 = info->flags5;
 	thing->flags6 = info->flags6;
+	thing->flags7 = info->flags7;
 	thing->health = info->health;
 	thing->target = NULL;
 	thing->lastenemy = NULL;
diff --git a/src/thingdef/thingdef_properties.cpp b/src/thingdef/thingdef_properties.cpp
index dc08db361..262846bf2 100644
--- a/src/thingdef/thingdef_properties.cpp
+++ b/src/thingdef/thingdef_properties.cpp
@@ -1286,7 +1286,8 @@ DEFINE_PROPERTY(clearflags, 0, Actor)
 		defaults->flags3 =
 		defaults->flags4 =
 		defaults->flags5 =
-		defaults->flags6 = 0;
+		defaults->flags6 =
+		defaults->flags7 = 0;
 	defaults->flags2 &= MF2_ARGSDEFINED;	// this flag must not be cleared
 }
 
diff --git a/src/version.h b/src/version.h
index 01fbc7a88..0c62c5ef2 100644
--- a/src/version.h
+++ b/src/version.h
@@ -76,7 +76,7 @@ const char *GetVersionString();
 
 // Use 4500 as the base git save version, since it's higher than the
 // SVN revision ever got.
-#define SAVEVER 4503
+#define SAVEVER 4504
 
 #define SAVEVERSTRINGIFY2(x) #x
 #define SAVEVERSTRINGIFY(x) SAVEVERSTRINGIFY2(x)