diff --git a/Fwk/AppFwk/cafProjectDataModel/cafPdmCore/cafPdmObjectHandle.h b/Fwk/AppFwk/cafProjectDataModel/cafPdmCore/cafPdmObjectHandle.h
index 31c6412634..5a16fea7ed 100644
--- a/Fwk/AppFwk/cafProjectDataModel/cafPdmCore/cafPdmObjectHandle.h
+++ b/Fwk/AppFwk/cafProjectDataModel/cafPdmCore/cafPdmObjectHandle.h
@@ -46,7 +46,7 @@ public:
     void                    addCapability(PdmObjectCapability* capability, bool takeOwnership) { m_capabilities.push_back(std::make_pair(capability, takeOwnership)); }
 
     template <typename CapabilityType>
-    CapabilityType* capability() 
+    CapabilityType* capability() const
     {
         for (size_t i = 0; i < m_capabilities.size(); ++i)
         {
@@ -56,8 +56,8 @@ public:
         return NULL;
     }
 
-    PdmUiObjectHandle*  uiCapability();     // Implementation is in cafPdmUiObjectHandle.cpp
-    PdmXmlObjectHandle* xmlCapability();    // Implementation is in cafPdmXmlObjectHandle.cpp
+    PdmUiObjectHandle*  uiCapability() const;     // Implementation is in cafPdmUiObjectHandle.cpp
+    PdmXmlObjectHandle* xmlCapability() const;    // Implementation is in cafPdmXmlObjectHandle.cpp
 
 protected: 
     void addField(PdmFieldHandle* field, const QString& keyword);
diff --git a/Fwk/AppFwk/cafProjectDataModel/cafPdmUiCore/cafPdmUiObjectHandle.cpp b/Fwk/AppFwk/cafProjectDataModel/cafPdmUiCore/cafPdmUiObjectHandle.cpp
index 8a61cfd718..bcd9d6bd43 100644
--- a/Fwk/AppFwk/cafProjectDataModel/cafPdmUiCore/cafPdmUiObjectHandle.cpp
+++ b/Fwk/AppFwk/cafProjectDataModel/cafPdmUiCore/cafPdmUiObjectHandle.cpp
@@ -228,7 +228,7 @@ void PdmUiObjectHandle::updateUiIconFromToggleField()
 //--------------------------------------------------------------------------------------------------
 /// Implementation of uiCapability() defined in cafPdmObjectHandle.h
 //--------------------------------------------------------------------------------------------------
-PdmUiObjectHandle* PdmObjectHandle::uiCapability()
+PdmUiObjectHandle* PdmObjectHandle::uiCapability() const
 {
     PdmUiObjectHandle* uiField = capability<PdmUiObjectHandle>();
     assert(uiField);
diff --git a/Fwk/AppFwk/cafProjectDataModel/cafPdmXml/cafPdmXmlObjectHandle.cpp b/Fwk/AppFwk/cafProjectDataModel/cafPdmXml/cafPdmXmlObjectHandle.cpp
index b5fb344fc5..9bcaa193a5 100644
--- a/Fwk/AppFwk/cafProjectDataModel/cafPdmXml/cafPdmXmlObjectHandle.cpp
+++ b/Fwk/AppFwk/cafProjectDataModel/cafPdmXml/cafPdmXmlObjectHandle.cpp
@@ -337,7 +337,7 @@ void PdmXmlObjectHandle::setupBeforeSaveRecursively(PdmObjectHandle* object)
 //--------------------------------------------------------------------------------------------------
 /// Implementation of xmlCapability() defined in cafPdmObjectHandle.h
 //--------------------------------------------------------------------------------------------------
-PdmXmlObjectHandle* PdmObjectHandle::xmlCapability()
+PdmXmlObjectHandle* PdmObjectHandle::xmlCapability() const
  {
     PdmXmlObjectHandle* xmlField = capability<PdmXmlObjectHandle>();
     assert(xmlField);