diff --git a/package/strongswan/Config.in b/package/strongswan/Config.in
index 47c7107f59..368cd1ecc0 100644
--- a/package/strongswan/Config.in
+++ b/package/strongswan/Config.in
@@ -75,6 +75,7 @@ config BR2_PACKAGE_STRONGSWAN_TNCCS_DYNAMIC
 
 config BR2_PACKAGE_STRONGSWAN_EAP
 	bool "Enable EAP protocols"
+	select BR2_PACKAGE_GMP
 	help
 	  Enable various EAP protocols:
 	    - mschapv2