Index: g10/gpg.c
===================================================================
--- g10/gpg.c
+++ g10/gpg.c
@@ -2998,6 +2998,8 @@
 	    xfree(s2k_digest_string);
 	    s2k_digest_string = xstrdup("md5");
 	    opt.compress_algo = COMPRESS_ALGO_ZIP;
+	    free_strlist(opt.sig_keyserver_url);
+	    opt.sig_keyserver_url=NULL;
 	  }
       }
     else if(PGP6)
@@ -3005,12 +3007,16 @@
 	opt.escape_from=1;
 	opt.force_v3_sigs=1;
 	opt.ask_sig_expire=0;
+	free_strlist(opt.sig_keyserver_url);
+	opt.sig_keyserver_url=NULL;
       }
     else if(PGP7)
       {
 	opt.escape_from=1;
 	opt.force_v3_sigs=1;
 	opt.ask_sig_expire=0;
+	free_strlist(opt.sig_keyserver_url);
+	opt.sig_keyserver_url=NULL;
       }
     else if(PGP8)
       {