2 files changed, 6 insertions, 2 deletions
diff --git a/xmpp-vala/src/core/stanza_attribute.vala b/xmpp-vala/src/core/stanza_attribute.vala
index 26e63f80..f751c801 100644
--- a/xmpp-vala/src/core/stanza_attribute.vala
+++ b/xmpp-vala/src/core/stanza_attribute.vala
@@ -32,7 +32,7 @@ public class StanzaAttribute : StanzaEntry {
         }
     }
 
-    public string to_string() {
+    public override string to_string(int i = 0) {
         return printf(ATTRIBUTE_STRING_FORMAT);
     }
 
diff --git a/xmpp-vala/src/core/stanza_node.vala b/xmpp-vala/src/core/stanza_node.vala
index 026b8ddb..67b8db35 100644
--- a/xmpp-vala/src/core/stanza_node.vala
+++ b/xmpp-vala/src/core/stanza_node.vala
@@ -42,6 +42,10 @@ public abstract class StanzaEntry {
     public virtual unowned string? get_string_content() {
         return val;
     }
+
+    public virtual string to_string(int i = 0) {
+        return get_string_content() ?? "(null)";
+    }
 }
 
 public class StanzaNode : StanzaEntry {
@@ -339,7 +343,7 @@ public class StanzaNode : StanzaEntry {
         return sb.str;
     }
 
-    public string to_string(int i = 0) {
+    public override string to_string(int i = 0) {
         return printf(i, TAG_START_BEGIN_FORMAT, TAG_START_EMPTY_END, TAG_START_CONTENT_END, TAG_END_FORMAT, StanzaAttribute.ATTRIBUTE_STRING_FORMAT);
     }