diff --git a/source/gameengine/Converter/BL_ArmatureChannel.cpp b/source/gameengine/Converter/BL_ArmatureChannel.cpp
index 1da4b388823..f64e62f0c88 100644
--- a/source/gameengine/Converter/BL_ArmatureChannel.cpp
+++ b/source/gameengine/Converter/BL_ArmatureChannel.cpp
@@ -434,7 +434,7 @@ PyAttributeDef BL_ArmatureBone::AttributesPtr[] = {
 	KX_PYATTRIBUTE_FLOAT_VECTOR_RO("arm_head",Bone,arm_head,3),
 	KX_PYATTRIBUTE_FLOAT_VECTOR_RO("arm_tail",Bone,arm_tail,3),
 	KX_PYATTRIBUTE_FLOAT_MATRIX_RO("arm_mat",Bone,arm_mat,4),
-	KX_PYATTRIBUTE_FLOAT_MATRIX_RO("bone_mat",Bone,bone_mat,4),
+	KX_PYATTRIBUTE_FLOAT_MATRIX_RO("bone_mat",Bone,bone_mat,3),
 	KX_PYATTRIBUTE_RO_FUNCTION("parent",BL_ArmatureBone,py_bone_get_parent),
 	KX_PYATTRIBUTE_RO_FUNCTION("children",BL_ArmatureBone,py_bone_get_children),
 	{ NULL }	//Sentinel