diff --git a/src/Mod/Arch/ArchEquipment.py b/src/Mod/Arch/ArchEquipment.py
index b24888bb08..f9e5d4321b 100644
--- a/src/Mod/Arch/ArchEquipment.py
+++ b/src/Mod/Arch/ArchEquipment.py
@@ -261,7 +261,7 @@ class _Equipment(ArchComponent.Component):
 
     def onChanged(self,obj,prop):
         self.hideSubobjects(obj,prop)
-        ArchComponent.Component.onChanged(self,obj.prop)
+        ArchComponent.Component.onChanged(self,obj,prop)
 
     def execute(self,obj):
 
diff --git a/src/Mod/Arch/ArchSpace.py b/src/Mod/Arch/ArchSpace.py
index 933b220faf..712a7e8806 100644
--- a/src/Mod/Arch/ArchSpace.py
+++ b/src/Mod/Arch/ArchSpace.py
@@ -290,7 +290,7 @@ class _Space(ArchComponent.Component):
                         obj.EquipmentPower = p
         if hasattr(obj,"Area"):
             obj.setEditorMode('Area',1)
-        ArchComponent.Component.onChanged(self,obj.prop)
+        ArchComponent.Component.onChanged(self,obj,prop)
 
     def addSubobjects(self,obj,subobjects):
         "adds subobjects to this space"
diff --git a/src/Mod/Arch/ArchStructure.py b/src/Mod/Arch/ArchStructure.py
index 98dc7a3c34..73770c66db 100644
--- a/src/Mod/Arch/ArchStructure.py
+++ b/src/Mod/Arch/ArchStructure.py
@@ -577,7 +577,7 @@ class _Structure(ArchComponent.Component):
             if nodes:
                 self.nodes = [v.Point.add(offset) for v in nodes.Vertexes]
                 obj.Nodes = self.nodes
-        ArchComponent.Component.onChanged(self,obj.prop)
+        ArchComponent.Component.onChanged(self,obj,prop)
 
     def getNodeEdges(self,obj):
         "returns a list of edges from stuctural nodes"
diff --git a/src/Mod/Arch/ArchWindow.py b/src/Mod/Arch/ArchWindow.py
index 5b20a950d7..820f374a69 100644
--- a/src/Mod/Arch/ArchWindow.py
+++ b/src/Mod/Arch/ArchWindow.py
@@ -688,7 +688,7 @@ class _Window(ArchComponent.Component):
                             # because of load order, but it doesn't harm...
                             pass
                         FreeCAD.ActiveDocument.recompute()
-        ArchComponent.Component.onChanged(self,obj.prop)
+        ArchComponent.Component.onChanged(self,obj,prop)
 
 
     def execute(self,obj):