diff --git a/CHANGELOG.md b/CHANGELOG.md
index a9dabbec..f4957ccf 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -80,6 +80,7 @@ Users may have to change how they access the system
 
 ### Corrected Bugs
 
+* Fixed: unknown nodes (for extenstions) did not work when placed directly under a grouping clause
 * Fixed: [Behaviour of Empty LIST Input in RESTCONF JSON #166](https://github.com/clicon/clixon/issues/166)
 * Netconf split lines input (input fragments) fixed
   * Netconf input split on several lines, eg using stdin: "<a>\nfoo</a>]]>]]>" could under some circumstances be split so that only "</a>]]>]]>" be properly processed. This could also happen to a socket receiving a sub-string and then after a delay receive the rest.
diff --git a/lib/src/clixon_yang_parse_lib.c b/lib/src/clixon_yang_parse_lib.c
index 7f975b8c..3629c81e 100644
--- a/lib/src/clixon_yang_parse_lib.c
+++ b/lib/src/clixon_yang_parse_lib.c
@@ -530,13 +530,13 @@ yang_expand_grouping(yang_stmt *yn)
 	    if ((ygrouping2 = ys_dup(ygrouping)) == NULL)
 		goto done;
 
-	    /* Only replace data/schemanodes:
+	    /* Only replace data/schemanodes and unknowns:
 	     * Compute the number of such nodes, and extend the child vector with that below
 	     */
 	    glen = 0;
 	    yg = NULL;
 	    while ((yg = yn_each(ygrouping2, yg)) != NULL) {
-		if (yang_schemanode(yg))
+		if (yang_schemanode(yg) || yang_keyword_get(yg) == Y_UNKNOWN)
 		    glen++;
 	    }
 	    /* 
@@ -584,7 +584,7 @@ yang_expand_grouping(yang_stmt *yn)
 	    for (j=0; j<yang_len_get(ygrouping2); j++){
 		yg = ygrouping2->ys_stmt[j]; /* Child of refined copy */
 		/* Only replace data/schemanodes */
-		if (!yang_schemanode(yg)){
+		if (!yang_schemanode(yg) && yang_keyword_get(yg) != Y_UNKNOWN){
 		    ys_free(yg);
 		    continue;
 		}