Index: source/blender/python/api2_2x/doc/Object.py
===================================================================
--- source/blender/python/api2_2x/doc/Object.py	(revision 15533)
+++ source/blender/python/api2_2x/doc/Object.py	(working copy)
@@ -374,6 +374,8 @@
 	@type matrixOldWorld: Matrix
 	@ivar matrixWorld: Same as L{mat}. Read-only.
 	@type matrixWorld: Matrix
+	@ivar negativeScale: Value is true if the object has negative scale. For mesh objects negative scale will cause the normals of the mesh to be flipped when the matrix (see L{matrix}) is applied to the mesh.
+	@type negativeScale: boolean
 	@ivar colbits: The Material usage mask. A set bit #n means: the Material
 		#n in the Object's material list is used. Otherwise, the Material #n
 		of the Objects Data material list is displayed.
Index: source/blender/python/api2_2x/Object.c
===================================================================
--- source/blender/python/api2_2x/Object.c	(revision 15533)
+++ source/blender/python/api2_2x/Object.c	(working copy)
@@ -4990,6 +4990,10 @@
 	 (getter)Object_getMatrixOldWorld, (setter)NULL,
 	 "old-type worldspace matrix (prior to Blender 2.34)",
 	 NULL},
+	{"negativeScale",
+	 (getter)Object_getTransflagBits, (setter)NULL,
+	 "Value is true if the object has negative scale",
+	 (void *)OB_NEG_SCALE},
 	{"data",
 	 (getter)get_obj_data, (setter)NULL,
 	 "The Datablock object linked to this object",