diff --git a/src/thingdef/thingdef_states.cpp b/src/thingdef/thingdef_states.cpp
index 6a28e54cd..eb740aad2 100644
--- a/src/thingdef/thingdef_states.cpp
+++ b/src/thingdef/thingdef_states.cpp
@@ -332,7 +332,8 @@ do_stop:
 					goto endofstate;
 				}
 
-				PSymbol *sym = bag.Info->Class->Symbols.FindSymbol (FName(sc.String, true), true);
+				FName funcname = FName(sc.String, true);
+				PSymbol *sym = bag.Info->Class->Symbols.FindSymbol (funcname, true);
 				if (sym != NULL && sym->SymbolType == SYM_ActionFunction)
 				{
 					PSymbolActionFunction *afd = static_cast<PSymbolActionFunction *>(sym);
@@ -434,7 +435,7 @@ do_stop:
 						sc.MustGetString();
 						if (sc.Compare("("))
 						{
-							sc.ScriptError("You cannot pass parameters to '%s'\n",sc.String);
+							sc.ScriptError("You cannot pass parameters to '%s'\n", funcname.GetChars());
 						}
 						sc.UnGet();
 					}
diff --git a/wadsrc/static/actors/doom/demon.txt b/wadsrc/static/actors/doom/demon.txt
index ecd6fa8a6..03dc5d86f 100644
--- a/wadsrc/static/actors/doom/demon.txt
+++ b/wadsrc/static/actors/doom/demon.txt
@@ -39,7 +39,7 @@ ACTOR Demon 3002
 		Goto See
 	Death:
 		SARG I 8
-		SARG J 8 A_Scream
+		SARG J 8 A_Scream()
 		SARG K 4
 		SARG L 4 A_NoBlocking
 		SARG M 4