diff --git a/crypto/asymmetric_keys/Kconfig b/crypto/asymmetric_keys/Kconfig
index 82e7d6b0c276b6d1e07c0148658b024d4785d92c..03a6eb95ab500bd37fe2b2e4000a73b1c01a99b0 100644
--- a/crypto/asymmetric_keys/Kconfig
+++ b/crypto/asymmetric_keys/Kconfig
@@ -23,6 +23,7 @@ config ASYMMETRIC_PUBLIC_KEY_SUBTYPE
 config PUBLIC_KEY_ALGO_RSA
 	tristate "RSA public-key algorithm"
 	select MPILIB_EXTRA
+	select MPILIB
 	help
 	  This option enables support for the RSA algorithm (PKCS#1, RFC3447).