diff --git a/atk/Util.custom b/atk/Util.custom
index e3d122cbd..d7445d355 100644
--- a/atk/Util.custom
+++ b/atk/Util.custom
@@ -53,7 +53,7 @@
 
 		[GLib.CDeclCallback]
 		delegate void RemoveListenerNativeDelegate (uint listener_id);
-                
+
 		static RemoveListenerDelegate remove_global_event_listener_handler;
 		static RemoveListenerNativeDelegate remove_global_event_listener_callback;
 
@@ -109,7 +109,7 @@
 
 		[GLib.CDeclCallback]
 		delegate uint AddKeyEventListenerNativeDelegate (AtkSharp.KeySnoopFuncNative native_func, IntPtr data);
-                
+
 		static AddKeyEventListenerDelegate add_key_event_listener_handler;
 		static AddKeyEventListenerNativeDelegate add_key_event_listener_callback;
 
@@ -190,10 +190,10 @@
 				atksharp_util_override_get_root (get_root_callback);
 			}
 		}
-               
+
 		[GLib.CDeclCallback]
 		delegate IntPtr GetToolkitNameNativeDelegate ();
-                
+
 		static GetToolkitNameDelegate get_toolkit_name_handler;
 		static GetToolkitNameNativeDelegate get_toolkit_name_callback;
 		static string toolkit_name;
@@ -228,10 +228,10 @@
 				atksharp_util_override_get_toolkit_name (get_toolkit_name_callback);
 			}
 		}
-               
+
 		[GLib.CDeclCallback]
 		delegate IntPtr GetToolkitVersionNativeDelegate ();
-                
+
 		static GetToolkitVersionDelegate get_toolkit_version_handler;
 		static GetToolkitVersionNativeDelegate get_toolkit_version_callback;
 		static string toolkit_version;
@@ -266,4 +266,4 @@
 				atksharp_util_override_get_toolkit_version (get_toolkit_version_callback);
 			}
 		}
-               
+