diff --git a/src/drivers/Cocoa/Fl_Cocoa_Printer_Driver.mm b/src/drivers/Cocoa/Fl_Cocoa_Printer_Driver.mm
index 9ff5090cd..142a95984 100644
--- a/src/drivers/Cocoa/Fl_Cocoa_Printer_Driver.mm
+++ b/src/drivers/Cocoa/Fl_Cocoa_Printer_Driver.mm
@@ -292,7 +292,7 @@ int Fl_Cocoa_Printer_Driver::start_page (void)
   else
 #endif
   {
-#if ! __LP64_
+#if ! __LP64__
     PMSessionGetGraphicsContext_type PMSessionGetGraphicsContext =
       (PMSessionGetGraphicsContext_type)Fl_Darwin_System_Driver::get_carbon_function("PMSessionGetGraphicsContext");
     status = PMSessionGetGraphicsContext(printSession, NULL, (void **)&gc);