diff --git a/lib/Kconfig b/lib/Kconfig
index 169eb7c5..d69d321 100644
--- a/lib/Kconfig
+++ b/lib/Kconfig
@@ -279,6 +279,9 @@
 
 	  If unsure, say N.
 
+config CLZ_TAB
+	bool
+
 config CORDIC
 	tristate "CORDIC algorithm"
 	help
@@ -287,6 +290,7 @@
 
 config MPILIB
 	tristate
+	select CLZ_TAB
 	help
 	  Multiprecision maths library from GnuPG.
 	  It is used to implement RSA digital signature verification,