diff --git a/include/nana/gui/widgets/toolbar.hpp b/include/nana/gui/widgets/toolbar.hpp
index 3116042d..cc0f4e24 100644
--- a/include/nana/gui/widgets/toolbar.hpp
+++ b/include/nana/gui/widgets/toolbar.hpp
@@ -38,7 +38,7 @@ namespace nana
 				nana::toolbar& widget;
 				std::size_t button;
 
-				void enable(bool enable_state) const;
+				void enable(bool enable_state);
 		    };
 
 			struct toolbar_events
diff --git a/source/gui/widgets/toolbar.cpp b/source/gui/widgets/toolbar.cpp
index 1c36d355..d34fc524 100644
--- a/source/gui/widgets/toolbar.cpp
+++ b/source/gui/widgets/toolbar.cpp
@@ -421,7 +421,7 @@ namespace nana
 			//class drawer
 
 			// Item Proxy
-			void item_proxy::enable(bool enable_state) const
+			void item_proxy::enable(bool enable_state)
 			{
 				widget.enable(button, enable_state);
 			}