diff --git a/src/config/defaults/pcbios.h b/src/config/defaults/pcbios.h
index 9092d675..b68186f1 100644
--- a/src/config/defaults/pcbios.h
+++ b/src/config/defaults/pcbios.h
@@ -26,7 +26,6 @@ FILE_LICENCE ( GPL2_OR_LATER );
 #define	IMAGE_PXE		/* PXE image support */
 #define IMAGE_SCRIPT		/* iPXE script image support */
 #define IMAGE_BZIMAGE		/* Linux bzImage image support */
-#define IMAGE_COMBOOT		/* SYSLINUX COMBOOT image support */
 
 #define PXE_STACK		/* PXE stack in iPXE - required for PXELINUX */
 #define PXE_MENU		/* PXE menu booting */