Index: b/g10/card-util.c
===================================================================
--- b/g10/card-util.c
+++ b/g10/card-util.c
@@ -1549,7 +1549,7 @@
       goto leave;
     }
 
-  allow_keyno[0] = (!use || (use & (PUBKEY_USAGE_SIG)));
+  allow_keyno[0] = (!use || (use & (PUBKEY_USAGE_SIG|PUBKEY_USAGE_CERT)));
   allow_keyno[1] = (!use || (use & (PUBKEY_USAGE_ENC)));
   allow_keyno[2] = (!use || (use & (PUBKEY_USAGE_SIG|PUBKEY_USAGE_AUTH)));