diff --git a/src/thingdef/thingdef_codeptr.cpp b/src/thingdef/thingdef_codeptr.cpp
index be53efbb99..26006088c2 100644
--- a/src/thingdef/thingdef_codeptr.cpp
+++ b/src/thingdef/thingdef_codeptr.cpp
@@ -5122,6 +5122,31 @@ DEFINE_ACTION_FUNCTION_PARAMS(AActor, A_RadiusGive)
 	ACTION_SET_RESULT(given);
 }
 
+//===========================================================================
+//
+// A_CheckSpecies
+//
+//===========================================================================
+DEFINE_ACTION_FUNCTION_PARAMS(AActor, A_CheckSpecies)
+{
+	ACTION_PARAM_START(3);
+	ACTION_PARAM_STATE(jump, 0);
+	ACTION_PARAM_NAME(species, 1);
+	ACTION_PARAM_INT(ptr, 2);
+
+	AActor *mobj = COPY_AAPTR(self, ptr);
+
+	ACTION_SET_RESULT(false);
+	//Needs at least one state jump to work. 
+	if (!mobj)
+	{
+		return;
+	}
+
+	if (jump && mobj->GetSpecies() == species)
+		ACTION_JUMP(jump);
+}
+
 
 //==========================================================================
 //
diff --git a/wadsrc/static/actors/actor.txt b/wadsrc/static/actors/actor.txt
index e435a18bf7..9333669d90 100644
--- a/wadsrc/static/actors/actor.txt
+++ b/wadsrc/static/actors/actor.txt
@@ -259,6 +259,7 @@ ACTOR Actor native //: Thinker
 	action native A_GiveToTarget(class<Inventory> itemtype, int amount = 0, int forward_ptr = AAPTR_DEFAULT);
 	action native A_TakeFromTarget(class<Inventory> itemtype, int amount = 0, int flags = 0, int forward_ptr = AAPTR_DEFAULT);
 	action native A_RadiusGive(class<Inventory> itemtype, int distance, int flags, int amount = 0, class<Actor> filter = "None", name species = "None", int mindist = 0);
+	action native A_CheckSpecies(state jump, name species = "", int ptr = AAPTR_DEFAULT);
 	action native A_CountdownArg(int argnum, state targstate = "");
 	action native A_CustomMeleeAttack(int damage = 0, sound meleesound = "", sound misssound = "", name damagetype = "none", bool bleed = true);
 	action native A_CustomComboAttack(class<Actor> missiletype, float spawnheight, int damage, sound meleesound = "", name damagetype = "none", bool bleed = true);