diff --git a/src/Mod/Assembly/UtilsAssembly.py b/src/Mod/Assembly/UtilsAssembly.py
index ca26472864..68eddfffbc 100644
--- a/src/Mod/Assembly/UtilsAssembly.py
+++ b/src/Mod/Assembly/UtilsAssembly.py
@@ -1004,6 +1004,22 @@ def findPlacement(ref, ignoreVertex=False):
                 return App.Placement(App.Vector(), App.Rotation(0.5, 0.5, 0.5, 0.5))
             if obj.Role == "Z_Axis":
                 return App.Placement(App.Vector(), App.Rotation(-0.5, 0.5, -0.5, 0.5))
+
+        # PartDesign datum planes (including ZTools datums like ZPlane_Mid, ZPlane_Offset)
+        if obj.isDerivedFrom("PartDesign::Plane"):
+            if hasattr(obj, "Shape") and obj.Shape.Faces:
+                face = obj.Shape.Faces[0]
+                surface = face.Surface
+                plc = App.Placement()
+                plc.Base = face.CenterOfGravity
+                if hasattr(surface, "Rotation") and surface.Rotation is not None:
+                    plc.Rotation = App.Rotation(surface.Rotation)
+                return obj.Placement.inverse() * plc
+
+        # PartDesign datum points
+        if obj.isDerivedFrom("PartDesign::Point"):
+            return obj.Placement
+
         return App.Placement()
 
     plc = App.Placement()