diff --git a/src/thingdef/thingdef_codeptr.cpp b/src/thingdef/thingdef_codeptr.cpp
index 6c5729cf38..a5fc1d08e7 100644
--- a/src/thingdef/thingdef_codeptr.cpp
+++ b/src/thingdef/thingdef_codeptr.cpp
@@ -470,30 +470,16 @@ DEFINE_ACTION_FUNCTION_PARAMS(AActor, A_JumpIfHealthLower)
 // State jump function
 //
 //==========================================================================
-DEFINE_ACTION_FUNCTION_PARAMS(AActor, A_JumpIfCloser)
+void DoJumpIfCloser(AActor *target, DECLARE_PARAMINFO)
 {
 	ACTION_PARAM_START(2);
 	ACTION_PARAM_FIXED(dist, 0);
 	ACTION_PARAM_STATE(jump, 1);
 
-	AActor *target;
-
-	if (!self->player)
-	{
-		target=self->target;
-	}
-	else
-	{
-		// Does the player aim at something that can be shot?
-		P_BulletSlope(self, &target);
-	}
-
 	ACTION_SET_RESULT(false);	// Jumps should never set the result for inventory state chains!
 
 	// No target - no jump
-	if (target==NULL) return;
-
-	if (P_AproxDistance(self->x-target->x, self->y-target->y) < dist &&
+	if (target != NULL && P_AproxDistance(self->x-target->x, self->y-target->y) < dist &&
 		( (self->z > target->z && self->z - (target->z + target->height) < dist) || 
 		  (self->z <=target->z && target->z - (self->z + self->height) < dist) 
 		)
@@ -503,6 +489,36 @@ DEFINE_ACTION_FUNCTION_PARAMS(AActor, A_JumpIfCloser)
 	}
 }
 
+DEFINE_ACTION_FUNCTION_PARAMS(AActor, A_JumpIfCloser)
+{
+	AActor *target;
+
+	if (!self->player)
+	{
+		target = self->target;
+	}
+	else
+	{
+		// Does the player aim at something that can be shot?
+		P_BulletSlope(self, &target);
+	}
+	DoJumpIfCloser(target, PUSH_PARAMINFO);
+}
+
+DEFINE_ACTION_FUNCTION_PARAMS(AActor, A_JumpIfTracerCloser)
+{
+	// Is there really any reason to limit this to seeker missiles?
+	if (self->flags2 & MF2_SEEKERMISSILE)
+	{
+		DoJumpIfCloser(self->tracer, PUSH_PARAMINFO);
+	}
+}
+
+DEFINE_ACTION_FUNCTION_PARAMS(AActor, A_JumpIfMasterCloser)
+{
+	DoJumpIfCloser(self->master, PUSH_PARAMINFO);
+}
+
 //==========================================================================
 //
 // State jump function
diff --git a/wadsrc/static/actors/actor.txt b/wadsrc/static/actors/actor.txt
index 1a18d2ed40..ec6e0cea03 100644
--- a/wadsrc/static/actors/actor.txt
+++ b/wadsrc/static/actors/actor.txt
@@ -188,6 +188,8 @@ ACTOR Actor native //: Thinker
 	action native A_CustomRailgun(int damage, int spawnofs_xy = 0, color color1 = "", color color2 = "", int flags = 0, bool aim = false, float maxdiff = 0, class<Actor> pufftype = "BulletPuff");
 	action native A_JumpIfHealthLower(int health, state label);
 	action native A_JumpIfCloser(float distance, state label);
+	action native A_JumpIfTracerCloser(float distance, state label);
+	action native A_JumpIfMasterCloser(float distance, state label);
 	action native A_JumpIfInventory(class<Inventory> itemtype, int itemamount, state label);
 	action native A_JumpIfArmorType(string Type, state label, int amount = 1);
 	action native A_GiveInventory(class<Inventory> itemtype, int amount = 0);