diff --git a/code/nel/include/nel/gui/dbview_number.h b/code/nel/include/nel/gui/dbview_number.h
index 2c76a255d..bfa963fb6 100644
--- a/code/nel/include/nel/gui/dbview_number.h
+++ b/code/nel/include/nel/gui/dbview_number.h
@@ -55,9 +55,7 @@ namespace NLGUI
 		static void forceLink();
 
 	protected:
-
-		sint64 getVal() { if (_Modulo == 0) return (_Number.getSInt64() / _Divisor);
-									else	return (_Number.getSInt64() / _Divisor)%_Modulo; }
+		sint64 getVal();
 
 	protected:
 
diff --git a/code/nel/include/nel/gui/interface_property.h b/code/nel/include/nel/gui/interface_property.h
index 63a62ef0e..4ed6e701e 100644
--- a/code/nel/include/nel/gui/interface_property.h
+++ b/code/nel/include/nel/gui/interface_property.h
@@ -47,6 +47,15 @@ namespace NLGUI
 			_VolatileValue = NULL;
 		}
 
+		/// Tells if this property has a value
+		bool hasValue() const
+		{
+			if( _VolatileValue != NULL )
+				return true;
+			else
+				return false;
+		}
+
 		NLMISC::CCDBNodeLeaf* getNodePtr() const
 		{
 			return _VolatileValue;
diff --git a/code/nel/src/gui/dbview_number.cpp b/code/nel/src/gui/dbview_number.cpp
index a0b6dfb02..bd193c47d 100644
--- a/code/nel/src/gui/dbview_number.cpp
+++ b/code/nel/src/gui/dbview_number.cpp
@@ -249,5 +249,16 @@ namespace NLGUI
 	{
 	}
 
+	sint64 CDBViewNumber::getVal()
+	{
+		if( !_Number.hasValue() )
+			return 0;
+
+		if( _Modulo == 0 )
+			return _Number.getSInt64() / _Divisor;
+		else
+			return ( _Number.getSInt64() / _Divisor ) % _Modulo;
+	}
+
 }