diff --git a/src/parser_xml.c b/src/parser_xml.c
index d01fdcd..40fda2f 100644
--- a/src/parser_xml.c
+++ b/src/parser_xml.c
@@ -485,6 +485,11 @@
 
         if (xmlctx->ws_only) {
             /* ignore WS-only value */
+            if (xmlctx->dynamic) {
+                free((char *) xmlctx->value);
+            }
+            xmlctx->dynamic = 0;
+            xmlctx->value = "";
             xmlctx->value_len = 0;
             format = LY_PREF_XML;
         } else {
diff --git a/src/xml.c b/src/xml.c
index c4351bc..debfe90 100644
--- a/src/xml.c
+++ b/src/xml.c
@@ -615,9 +615,10 @@
 
         /* store every namespace */
         if ((prefix && !ly_strncmp("xmlns", prefix, prefix_len)) || (!prefix && !ly_strncmp("xmlns", name, name_len))) {
-            LY_CHECK_GOTO(ret = lyxml_ns_add(xmlctx, prefix ? name : NULL, prefix ? name_len : 0,
-                    dynamic ? value : strndup(value, value_len)), cleanup);
+            ret = lyxml_ns_add(xmlctx, prefix ? name : NULL, prefix ? name_len : 0,
+                    dynamic ? value : strndup(value, value_len));
             dynamic = 0;
+            LY_CHECK_GOTO(ret, cleanup);
         } else {
             /* not a namespace */
             is_ns = 0;
@@ -918,9 +919,13 @@
             LY_CHECK_GOTO(ret, cleanup);
 
             if (!xmlctx->value_len) {
+                /* empty value should by alocated staticaly, but check for in any case */
+                if (xmlctx->dynamic) {
+                    free((char *) xmlctx->value);
+                }
                 /* use empty value, easier to work with */
                 xmlctx->value = "";
-                assert(!xmlctx->dynamic);
+                xmlctx->dynamic = 0;
             }
 
             /* update status */