diff --git a/lcl/interfaces/cocoa/cocoawscommon.pas b/lcl/interfaces/cocoa/cocoawscommon.pas
index 3a254a246b..e42609e712 100644
--- a/lcl/interfaces/cocoa/cocoawscommon.pas
+++ b/lcl/interfaces/cocoa/cocoawscommon.pas
@@ -239,7 +239,7 @@ var
 
     function LastClickInTime: boolean;
     begin
-      Result := ((Event.timestamp - LastMouse.TimeStamp) <= ((1/86400)*(Event.doubleClickInterval/1000)));
+      Result := (Event.timestamp - LastMouse.TimeStamp) <= Event.doubleClickInterval;
     end;
 
     function TestIfMultiClick: boolean;