diff --git a/common/spl/Kconfig b/common/spl/Kconfig
index 048b85b..ef4fb19 100644
--- a/common/spl/Kconfig
+++ b/common/spl/Kconfig
@@ -26,7 +26,7 @@
 	  and the Linux Kernel.  If unsure, say Y.
 
 config SPL_SIZE_LIMIT
-	int "Maximum size of SPL image"
+	hex "Maximum size of SPL image"
 	depends on SPL
 	default 69632 if ARCH_MX6
 	default 0