diff --git a/src/thingdef/thingdef_exp.h b/src/thingdef/thingdef_exp.h
index 239c2ad886..9097e1ffc2 100644
--- a/src/thingdef/thingdef_exp.h
+++ b/src/thingdef/thingdef_exp.h
@@ -62,13 +62,11 @@ struct FCompileContext
 {
 	PClassActor *cls;
 	bool lax;
-	bool isconst;
 
-	FCompileContext(PClassActor *_cls = NULL, bool _lax = false, bool _isconst = false)
+	FCompileContext(PClassActor *_cls = NULL, bool _lax = false)
 	{
 		cls = _cls;
 		lax = _lax;
-		isconst = _isconst;
 	}
 
 	PSymbol *FindInClass(FName identifier)
diff --git a/src/thingdef/thingdef_parse.cpp b/src/thingdef/thingdef_parse.cpp
index 23d7fd00a2..0ac87bb359 100644
--- a/src/thingdef/thingdef_parse.cpp
+++ b/src/thingdef/thingdef_parse.cpp
@@ -208,7 +208,7 @@ static void ParseConstant (FScanner &sc, PSymbolTable *symt, PClassActor *cls)
 		FxExpression *expr = ParseExpression (sc, cls);
 		sc.MustGetToken(';');
 
-		FCompileContext ctx(cls, true, true);
+		FCompileContext ctx(cls, true);
 		expr = expr->Resolve(ctx);
 		if (!expr->isConstant())
 		{
@@ -266,7 +266,7 @@ static void ParseEnum (FScanner &sc, PSymbolTable *symt, PClassActor *cls)
 		if (sc.CheckToken('='))
 		{
 			FxExpression *expr = ParseExpression (sc, cls);
-			FCompileContext ctx(cls, true, true);
+			FCompileContext ctx(cls, true);
 			expr = expr->Resolve(ctx);
 			if (!expr->isConstant())
 			{
@@ -355,7 +355,7 @@ static void ParseNativeVariable (FScanner &sc, PSymbolTable *symt, PClassActor *
 	if (sc.CheckToken('['))
 	{
 		FxExpression *expr = ParseExpression (sc, cls);
-		FCompileContext ctx(cls, true, true);
+		FCompileContext ctx(cls, true);
 		expr = expr->Resolve(ctx);
 		if (!expr->isConstant())
 		{
@@ -428,7 +428,7 @@ static void ParseUserVariable (FScanner &sc, PSymbolTable *symt, PClassActor *cl
 	if (sc.CheckToken('['))
 	{
 		FxExpression *expr = ParseExpression(sc, cls);
-		FCompileContext ctx(cls, true, true);
+		FCompileContext ctx(cls, true);
 		int maxelems;
 		expr = expr->Resolve(ctx);
 		if (!expr->isConstant())