diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index ebf72b3ee0..7d007bb60a 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -53,7 +53,7 @@ config RAMTOP
 
 config XIP_ROM_SIZE
 	hex
-	default 0x10000
+	default ROM_SIZE
 
 config CPU_ADDR_BITS
 	int