diff --git a/src/blackmisc/blackmiscfreefunctions.cpp b/src/blackmisc/blackmiscfreefunctions.cpp
index 3e1dca518..b04b1a52f 100644
--- a/src/blackmisc/blackmiscfreefunctions.cpp
+++ b/src/blackmisc/blackmiscfreefunctions.cpp
@@ -15,6 +15,7 @@
  */
 void BlackMisc::PhysicalQuantities::registerMetadata()
 {
+    CMeasurementUnit::registerMetadata();
     CAcceleration::registerMetadata();
     CAngle::registerMetadata();
     CFrequency::registerMetadata();
diff --git a/src/blackmisc/pqbase.cpp b/src/blackmisc/pqbase.cpp
index 40240a255..cef13d6c9 100644
--- a/src/blackmisc/pqbase.cpp
+++ b/src/blackmisc/pqbase.cpp
@@ -74,5 +74,16 @@ namespace BlackMisc
             return s;
         }
 
+        /*!
+         * \brief Register metadata of unit and quantity
+         */
+        void CMeasurementUnit::registerMetadata()
+        {
+            qRegisterMetaType<CMeasurementUnit>();
+            qDBusRegisterMetaType<CMeasurementUnit>();
+        }
+
+
+
     } // namespace
 } // namespace
diff --git a/src/blackmisc/pqbase.h b/src/blackmisc/pqbase.h
index 797db009e..125717c2f 100644
--- a/src/blackmisc/pqbase.h
+++ b/src/blackmisc/pqbase.h
@@ -403,10 +403,16 @@ namespace BlackMisc
                 static CMeasurementUnit none("none", "", NilConverter(), 0, 0);
                 return none;
             }
+
+            /*!
+             * \brief Metadata, mainly needed for None
+             */
+            static void registerMetadata();
         };
 
     } // namespace
 } // namespace
 
+Q_DECLARE_METATYPE(BlackMisc::PhysicalQuantities::CMeasurementUnit)
 
 #endif // guard