diff --git a/src/GEOMToolsGUI/GEOMToolsGUI_1.cxx b/src/GEOMToolsGUI/GEOMToolsGUI_1.cxx
index 7706ab3c9..9efec8b19 100644
--- a/src/GEOMToolsGUI/GEOMToolsGUI_1.cxx
+++ b/src/GEOMToolsGUI/GEOMToolsGUI_1.cxx
@@ -419,7 +419,7 @@ void GEOMToolsGUI::OnChangeTransparency( bool increase )
     return;
 
   // Delta
-  float delta = 0.01;
+  float delta = 0.1; // VSR: 23/11/2010 (transparency value <= 0.05 is ignored)
   if ( !increase )
     delta *= -1;