diff --git a/src/p_map.cpp b/src/p_map.cpp
index 27a32e639..f89282674 100644
--- a/src/p_map.cpp
+++ b/src/p_map.cpp
@@ -755,7 +755,7 @@ bool PIT_CheckThing (AActor *thing, FCheckPosition &tm)
 	if ((thing->flags2 | tm.thing->flags2) & MF2_THRUACTORS) 
 		return true;
 
-	if ((tm.thing->flags6 & MF6_THRUSPECIES) && (tm.thing->Species == thing->Species))
+	if ((tm.thing->flags6 & MF6_THRUSPECIES) && (tm.thing->GetSpecies() == thing->GetSpecies()))
 		return true;
 
 	if (!(thing->flags & (MF_SOLID|MF_SPECIAL|MF_SHOOTABLE)) )
diff --git a/src/thingdef/thingdef_codeptr.cpp b/src/thingdef/thingdef_codeptr.cpp
index 02108f7fb..af898a697 100644
--- a/src/thingdef/thingdef_codeptr.cpp
+++ b/src/thingdef/thingdef_codeptr.cpp
@@ -535,7 +535,7 @@ DEFINE_ACTION_FUNCTION_PARAMS(AActor, A_JumpIfArmorType)
 	ACTION_PARAM_START(3);
 	ACTION_PARAM_NAME(Type, 0);
 	ACTION_PARAM_STATE(JumpOffset, 1);
-	ACTION_PARAM_INT(amount, 1);
+	ACTION_PARAM_INT(amount, 2);
 
 	ACTION_SET_RESULT(false);	// Jumps should never set the result for inventory state chains!