2 files changed, 13 insertions, 0 deletions
diff --git a/source/blender/makesrna/intern/rna_constraint.c b/source/blender/makesrna/intern/rna_constraint.c
index d34885e1a68..28aef635688 100644
--- a/source/blender/makesrna/intern/rna_constraint.c
+++ b/source/blender/makesrna/intern/rna_constraint.c
@@ -206,6 +206,7 @@ static const EnumPropertyItem target_space_pchan_items[] = {
      "Custom Space",
      "The transformation of the target is evaluated relative to a custom object/bone/vertex "
      "group"},
+    {0, "", 0, NULL, NULL},
     {CONSTRAINT_SPACE_POSE,
      "POSE",
      0,
@@ -224,6 +225,14 @@ static const EnumPropertyItem target_space_pchan_items[] = {
      "Local Space",
      "The transformation of the target is evaluated relative to its local "
      "coordinate system"},
+    {CONSTRAINT_SPACE_OWNLOCAL,
+     "LOCAL_OWNER_ORIENT",
+     0,
+     "Local Space (Owner Orientation)",
+     "The transformation of the target bone is evaluated relative to its local coordinate "
+     "system, followed by a correction for the difference in target and owner rest pose "
+     "orientations. When applied as local transform to the owner produces the same global "
+     "motion as the target if the parents are still in rest pose"},
     {0, NULL, 0, NULL, NULL},
 };
 
@@ -238,6 +247,7 @@ static const EnumPropertyItem owner_space_pchan_items[] = {
      0,
      "Custom Space",
      "The constraint is applied in local space of a custom object/bone/vertex group"},
+    {0, "", 0, NULL, NULL},
     {CONSTRAINT_SPACE_POSE,
      "POSE",
      0,
diff --git a/source/blender/makesrna/intern/rna_object_api.c b/source/blender/makesrna/intern/rna_object_api.c
index 4608b0c1bac..10ba2b9acb1 100644
--- a/source/blender/makesrna/intern/rna_object_api.c
+++ b/source/blender/makesrna/intern/rna_object_api.c
@@ -303,6 +303,9 @@ static void rna_Object_mat_convert_space(Object *ob,
 {
   copy_m4_m4((float(*)[4])mat_ret, (float(*)[4])mat);
 
+  BLI_assert(!ELEM(from, CONSTRAINT_SPACE_OWNLOCAL));
+  BLI_assert(!ELEM(to, CONSTRAINT_SPACE_OWNLOCAL));
+
   /* Error in case of invalid from/to values when pchan is NULL */
   if (pchan == NULL) {
     if (ELEM(from, CONSTRAINT_SPACE_POSE, CONSTRAINT_SPACE_PARLOCAL)) {