diff --git a/FL/Fl.H b/FL/Fl.H
index dc1d040c4..42eec3953 100644
--- a/FL/Fl.H
+++ b/FL/Fl.H
@@ -471,7 +471,7 @@ public:
   static int  has_check(Fl_Timeout_Handler, void* = 0);
   static void remove_check(Fl_Timeout_Handler, void* = 0);
 
-  static Fl_Timestamp now(double delay = 0);
+  static Fl_Timestamp now(double offset = 0);
   static double seconds_since(Fl_Timestamp& then);
   static double seconds_between(Fl_Timestamp& back, Fl_Timestamp& further_back);
   static long ticks_since(Fl_Timestamp& then);