diff --git a/arch/x86/boot/header.S b/arch/x86/boot/header.S
index b4e15dd6786a..2a017441b8b2 100644
--- a/arch/x86/boot/header.S
+++ b/arch/x86/boot/header.S
@@ -32,10 +32,6 @@ SYSSEG		= 0x1000		/* historical load address >> 4 */
 #define SVGA_MODE ASK_VGA
 #endif
 
-#ifndef RAMDISK
-#define RAMDISK 0
-#endif
-
 #ifndef ROOT_RDONLY
 #define ROOT_RDONLY 1
 #endif