diff --git a/g10/ChangeLog b/g10/ChangeLog
index 281fb1534..804945eb3 100644
--- a/g10/ChangeLog
+++ b/g10/ChangeLog
@@ -1,5 +1,8 @@
 2002-05-11  Werner Koch  <wk@gnupg.org>
 
+	* mainproc.c (proc_symkey_enc): Avoid segv in case the parser
+	encountered an invalid packet.
+
 	* keyserver.c (keyserver_export): Get confirmation before sending
 	all keys.
 
diff --git a/g10/mainproc.c b/g10/mainproc.c
index 7439e43dc..84824c275 100644
--- a/g10/mainproc.c
+++ b/g10/mainproc.c
@@ -244,7 +244,9 @@ proc_symkey_enc( CTX c, PACKET *pkt )
     PKT_symkey_enc *enc;
 
     enc = pkt->pkt.symkey_enc;
-    if (enc->seskeylen)
+    if (!enc)
+        log_error ("invalid symkey encrypted packet\n");
+    else if (enc->seskeylen) 
 	log_error ("symkey_enc packet with session keys are not supported!\n");
     else {
         int algo = enc->cipher_algo;