diff --git a/src/info.h b/src/info.h
index e198bb26c..86d653fe4 100644
--- a/src/info.h
+++ b/src/info.h
@@ -67,6 +67,14 @@ enum EStateDefineFlags
 	SDF_DEHACKED = 8,	// Identify a state as having been modified by a dehacked lump
 };
 
+enum EStateUseFlags
+{
+	SUF_ACTOR = 1,
+	SUF_OVERLAY = 2,
+	SUF_WEAPON = 4,
+	SUF_ITEM = 8,
+};
+
 enum EStateType : int // this must ensure proper alignment.
 {
 	STATE_Actor,
@@ -97,11 +105,12 @@ struct FState
 	WORD		sprite;
 	SWORD		Tics;
 	WORD		TicRange;
+	short		Light;
 	BYTE		Frame;
+	BYTE		UseFlags;		
 	BYTE		DefineFlags;	// Unused byte so let's use it during state creation.
 	int			Misc1;			// Was changed to SBYTE, reverted to long for MBF compat
 	int			Misc2;			// Was changed to BYTE, reverted to long for MBF compat
-	short		Light;
 	BYTE		Fullbright:1;	// State is fullbright
 	BYTE		SameFrame:1;	// Ignore Frame (except when spawning actor)
 	BYTE		Fast:1;
@@ -153,6 +162,10 @@ struct FState
 	{
 		Frame = frame - 'A';
 	}
+	inline bool CheckUse(int usetype)
+	{
+		return !!(UseFlags & usetype);
+	}
 	void SetAction(VMFunction *func) { ActionFunc = func; }
 	void ClearAction() { ActionFunc = NULL; }
 	void SetAction(const char *name);
diff --git a/src/p_actionfunctions.cpp b/src/p_actionfunctions.cpp
index d61dc100c..d56c7ee64 100644
--- a/src/p_actionfunctions.cpp
+++ b/src/p_actionfunctions.cpp
@@ -3622,7 +3622,7 @@ DEFINE_ACTION_FUNCTION_PARAMS(AActor, CheckRange)
 			}
 		}
 	}
-	ACTION_RETURN_BOOL(false);
+	ACTION_RETURN_BOOL(true);
 }
 
 
diff --git a/src/scripting/decorate/thingdef_parse.cpp b/src/scripting/decorate/thingdef_parse.cpp
index 151d88521..490d9cf79 100644
--- a/src/scripting/decorate/thingdef_parse.cpp
+++ b/src/scripting/decorate/thingdef_parse.cpp
@@ -1062,11 +1062,6 @@ static void ParseActor(FScanner &sc)
 			break;
 
 		case TK_States:
-			if (bag.StateSet) 
-			{
-				sc.ScriptMessage("'%s' contains multiple state declarations", bag.Info->TypeName.GetChars());
-				FScriptPosition::ErrorCounter++;
-			}
 			ParseStates(sc, bag.Info, (AActor *)bag.Info->Defaults, bag);
 			bag.StateSet = true;
 			break;
diff --git a/src/scripting/thingdef.h b/src/scripting/thingdef.h
index 2c13d8eb7..3ff347ac6 100644
--- a/src/scripting/thingdef.h
+++ b/src/scripting/thingdef.h
@@ -63,6 +63,7 @@ class FStateDefinitions
 	FState *laststatebeforelabel;
 	intptr_t lastlabel;
 	TArray<FState> StateArray;
+	uint8_t UseType;
 
 	static FStateDefine *FindStateLabelInList(TArray<FStateDefine> &list, FName name, bool create);
 	static FStateLabels *CreateStateLabelList(TArray<FStateDefine> &statelist);
@@ -74,6 +75,10 @@ class FStateDefinitions
 	FState *ResolveGotoLabel(AActor *actor, PClassActor *mytype, char *name);
 	static void FixStatePointers(PClassActor *actor, TArray<FStateDefine> & list);
 	void ResolveGotoLabels(PClassActor *actor, AActor *defaults, TArray<FStateDefine> & list);
+	void SetUseType(int type)
+	{
+		UseType = uint8_t(type);
+	}
 
 public:
 
diff --git a/wadsrc/static/zscript/constants.txt b/wadsrc/static/zscript/constants.txt
index 7c3038a74..5e47bbc7e 100644
--- a/wadsrc/static/zscript/constants.txt
+++ b/wadsrc/static/zscript/constants.txt
@@ -1,6 +1,14 @@
 // for flag changer functions.
 const FLAG_NO_CHANGE = -1;
 
+enum EStateUseFlags
+{
+	SUF_ACTOR = 1,
+	SUF_OVERLAY = 2,
+	SUF_WEAPON = 4,
+	SUF_ITEM = 8,
+};
+
 // Flags for A_PainAttack
 enum EPainAttackFlags
 {