diff --git a/apps/restconf/README.md b/apps/restconf/README.md
index c8654187..dcce7567 100644
--- a/apps/restconf/README.md
+++ b/apps/restconf/README.md
@@ -9,6 +9,11 @@ Ensure www-data is member of the CLICON_SOCK_GROUP (default clicon). If not, add
 
 This implementation uses FastCGI, see http://www.mit.edu/~yandros/doc/specs/fcgi-spec.html.
 
+Download and start nginx. For example on ubuntu:
+```
+  sudo apt install ngnix
+```
+
 Define nginx config file: /etc/nginx/sites-available/default
 ```
 server {
@@ -68,6 +73,12 @@ olof@vandal> curl -G http://127.0.0.1/restconf/data/interfaces/interface/name=et
 
 curl -sX POST -d '{"interfaces":{"interface":{"name":"eth1","type":"eth","enabled":"true"}}}' http://localhost/restconf/data
 ```
+### Nginx Nchan for streams
+
+Restconf notification event streams needs a server-side push
+package. Clixon has used Nchan (nchan.io) for this
+
+Download and install nchan, see nchan.io, Install section.
 
 ### Debugging
 
diff --git a/lib/src/clixon_stream.c b/lib/src/clixon_stream.c
index 25538b2f..31859ca3 100644
--- a/lib/src/clixon_stream.c
+++ b/lib/src/clixon_stream.c
@@ -114,6 +114,7 @@ stream_register(clicon_handle h,
 }
 
 /*! Delete complete notification event stream list (not just single stream)
+ * @param[in] es 
  */
 int
 stream_delete_all(event_stream_t *es)
@@ -315,7 +316,6 @@ stream_notify_xml(clicon_handle h,
  *    err;
  * @endcode
  * @see stream_notify_xml
- * @see backend_notify
  */
 int
 stream_notify(clicon_handle h, 
diff --git a/lib/src/clixon_yang.c b/lib/src/clixon_yang.c
index 5b053217..874f3256 100644
--- a/lib/src/clixon_yang.c
+++ b/lib/src/clixon_yang.c
@@ -2471,7 +2471,7 @@ yang_spec_append(clicon_handle h,
 		 char         *yang_revision)
 {
     int        retval = -1;
-    yang_spec *yspec;
+    yang_spec *yspec = NULL;
     yang_spec *yspec0;
     yang_stmt *ym = NULL; /* module */