diff --git a/board/sysam/stmark2/Kconfig b/board/sysam/stmark2/Kconfig
index b259505..94f5049 100644
--- a/board/sysam/stmark2/Kconfig
+++ b/board/sysam/stmark2/Kconfig
@@ -11,7 +11,7 @@
 	depends on CF_SBF
 
 config SYS_INPUT_CLKSRC
-	hex
+	int "External crystal clock"
 	default 30000000
 
 config SYS_CPU