diff --git a/src/thingdef/thingdef_data.cpp b/src/thingdef/thingdef_data.cpp
index fd99cf5150..82fe3a739f 100644
--- a/src/thingdef/thingdef_data.cpp
+++ b/src/thingdef/thingdef_data.cpp
@@ -651,6 +651,6 @@ void InitThingdef()
 	symt.AddSymbol(new PField(NAME_ReactionTime,TypeSInt32,	VARF_Native, myoffsetof(AActor,reactiontime)));
 	symt.AddSymbol(new PField(NAME_MeleeRange,	TypeFixed,	VARF_Native, myoffsetof(AActor,meleerange)));
 	symt.AddSymbol(new PField(NAME_Speed,		TypeFixed,	VARF_Native, myoffsetof(AActor,Speed)));
-	symt.AddSymbol(new PField(NAME_Threshold,	TypeFixed, VARF_Native, myoffsetof(AActor,threshold)));
-	symt.AddSymbol(new PField(NAME_DefThreshold,TypeFixed, VARF_Native, myoffsetof(AActor,DefThreshold)));
+	symt.AddSymbol(new PField(NAME_Threshold,	TypeSInt32, VARF_Native, myoffsetof(AActor,threshold)));
+	symt.AddSymbol(new PField(NAME_DefThreshold,TypeSInt32, VARF_Native, myoffsetof(AActor,DefThreshold)));
 }