diff --git a/src/p_map.cpp b/src/p_map.cpp
index ae3dfd0f2..9ca2d3a8f 100644
--- a/src/p_map.cpp
+++ b/src/p_map.cpp
@@ -6358,6 +6358,21 @@ void PIT_CeilingRaise(AActor *thing, FChangePosition *cpos)
 //
 //=============================================================================
 
+//
+DEFINE_ACTION_FUNCTION(_Sector, ChangeSector)
+{
+	PARAM_SELF_STRUCT_PROLOGUE(sector_t);
+	PARAM_INT(crunch);
+	PARAM_FLOAT(amt);
+	PARAM_INT(floorOrCeil);
+	PARAM_BOOL(isreset);
+	PARAM_BOOL(instant);
+
+	bool b = P_ChangeSector(self, crunch, amt, floorOrCeil, isreset, instant);
+
+	ACTION_RETURN_BOOL(b);
+}
+
 bool P_ChangeSector(sector_t *sector, int crunch, double amt, int floorOrCeil, bool isreset, bool instant)
 {
 	FChangePosition cpos;
diff --git a/wadsrc/static/zscript/mapdata.txt b/wadsrc/static/zscript/mapdata.txt
index b7589f8d4..15f798460 100644
--- a/wadsrc/static/zscript/mapdata.txt
+++ b/wadsrc/static/zscript/mapdata.txt
@@ -270,7 +270,7 @@ struct Sector native
 		SECF_NOMODIFY = SECF_SECRET|SECF_WASSECRET,	// not modifiable by Sector_ChangeFlags
 		SECF_SPECIALFLAGS = SECF_DAMAGEFLAGS|SECF_FRICTION|SECF_PUSH,	// these flags originate from 'special and must be transferrable by floor thinkers
 	}
-	
+
 	enum EMoveResult 
 	{ 
 		MOVE_OK, 
@@ -289,6 +289,15 @@ struct Sector native
 
 	native int Index();
 
+	enum EChangeSectorMode
+	{
+		CS_Floor = 0,
+		CS_Ceiling = 1,
+		CS_3DMidTex = 2
+	};
+
+	native bool ChangeSector(int crunch, double amt, EChangeSectorMode mode/*floorOrCeiling*/, bool isreset, bool instant);
+
 	native double, Sector, F3DFloor NextHighestCeilingAt(double x, double y, double bottomz, double topz, int flags = 0);
 	native double, Sector, F3DFloor NextLowestFloorAt(double x, double y, double z, int flags = 0, double steph = 0);