diff --git a/arch/sandbox/Kconfig b/arch/sandbox/Kconfig
index 852a7c8..35508c6 100644
--- a/arch/sandbox/Kconfig
+++ b/arch/sandbox/Kconfig
@@ -13,7 +13,7 @@
 config SANDBOX64
 	bool "Use 64-bit addresses"
 	select PHYS_64BIT
-	select HOST_64BIT
+	depends on HOST_64BIT
 
 config SANDBOX_RAM_SIZE_MB
 	int "RAM size in MiB"
@@ -41,23 +41,11 @@
 	default "sandbox_spl" if SANDBOX_SPL
 	default "sandbox" if !SANDBOX_SPL
 
-choice
-	prompt "Run sandbox on 32/64-bit host"
-	default HOST_64BIT
-	help
-	  Sandbox can be built on 32-bit and 64-bit hosts.
-	  The default is to build on a 64-bit host and run
-	  on a 64-bit host. If you want to run sandbox on
-	  a 32-bit host, change it here.
-
 config HOST_32BIT
-	bool "32-bit host"
-	depends on !PHYS_64BIT
+	def_bool ! $(cc-define,_LP64)
 
 config HOST_64BIT
-	bool "64-bit host"
-
-endchoice
+	def_bool $(cc-define,_LP64)
 
 config SANDBOX_CRASH_RESET
 	bool "Reset on crash"