diff --git a/src/add-ons/kernel/drivers/ports/usb_serial/Jamfile b/src/add-ons/kernel/drivers/ports/usb_serial/Jamfile
index 921d2d956e..5441c37813 100644
--- a/src/add-ons/kernel/drivers/ports/usb_serial/Jamfile
+++ b/src/add-ons/kernel/drivers/ports/usb_serial/Jamfile
@@ -2,7 +2,7 @@ SubDir HAIKU_TOP src add-ons kernel drivers ports usb_serial ;
 
 SetSubDirSupportedPlatformsBeOSCompatible ;
 
-local defines = [ FDefines DB_USB_USE_V2_MODULE ] ;
+local defines = [ FDefines B_USB_USE_V2_MODULE ] ;
 
 SubDirCcFlags $(defines) ;