diff --git a/src/Fl_Quartz_Printer.mm b/src/Fl_Quartz_Printer.mm
index a323d5844..1225e8825 100644
--- a/src/Fl_Quartz_Printer.mm
+++ b/src/Fl_Quartz_Printer.mm
@@ -246,7 +246,7 @@ int Fl_System_Printer::start_page (void)
   else
 #endif
   {
-#if ! __LP64_
+#if ! __LP64__
     PMSessionGetGraphicsContext_type PMSessionGetGraphicsContext =
       (PMSessionGetGraphicsContext_type)Fl_X::get_carbon_function("PMSessionGetGraphicsContext");
     status = PMSessionGetGraphicsContext(printSession, NULL, (void **)&fl_gc);