diff --git a/daemon/control_ng.c b/daemon/control_ng.c
index 0cfd0b295..a66dd0728 100644
--- a/daemon/control_ng.c
+++ b/daemon/control_ng.c
@@ -480,6 +480,7 @@ const ng_parser_t ng_parser_native = {
 	.dict_add_string = bencode_dictionary_add_string,
 	.dict_add_str = bencode_dictionary_add_str,
 	.dict_add_str_dup = bencode_dictionary_add_str_dup,
+	.dict_add_str_dup_dup = bencode_dictionary_add_str_dup_dup,
 	.dict_add_int = bencode_dictionary_add_integer,
 	.dict_add_dict = __bencode_dictionary_add_dictionary,
 	.dict_add_dict_dup = __bencode_dictionary_add_dictionary_dup,
@@ -516,6 +517,7 @@ const ng_parser_t ng_parser_json = {
 	.dict_add_string = json_dict_add_string,
 	.dict_add_str = json_dict_add_str,
 	.dict_add_str_dup = json_dict_add_str,
+	.dict_add_str_dup_dup = json_dict_add_str,
 	.dict_add_int = json_dict_add_int,
 	.dict_add_dict = json_dict_add_dict,
 	.dict_add_dict_dup = json_dict_add_dict,
diff --git a/include/control_ng.h b/include/control_ng.h
index 078f1473e..7481b3bd1 100644
--- a/include/control_ng.h
+++ b/include/control_ng.h
@@ -120,6 +120,7 @@ struct ng_parser {
 	void (*dict_add_string)(parser_arg, const char *, const char *);
 	void (*dict_add_str)(parser_arg, const char *, const str *);
 	void (*dict_add_str_dup)(parser_arg, const char *, const str *);
+	void (*dict_add_str_dup_dup)(parser_arg, const char *, const str *);
 	void (*dict_add_int)(parser_arg, const char *, long long);
 	parser_arg (*dict_add_dict)(parser_arg, const char *);
 	parser_arg (*dict_add_dict_dup)(parser_arg, const char *);
diff --git a/lib/bencode.h b/lib/bencode.h
index 464e672da..b975b6a80 100644
--- a/lib/bencode.h
+++ b/lib/bencode.h
@@ -116,6 +116,7 @@ INLINE void bencode_dictionary_add_string(bencode_item_t *dict, const char *key,
 INLINE void bencode_dictionary_add_str(bencode_item_t *dict, const char *key, const str *val);
 INLINE void bencode_dictionary_str_add_str(bencode_item_t *dict, const str *key, const str *val);
 INLINE void bencode_dictionary_add_str_dup(bencode_item_t *dict, const char *key, const str *val);
+INLINE void bencode_dictionary_add_str_dup_dup(bencode_item_t *dict, const char *key, const str *val);
 
 /* Convenience functions to add the respective (newly created) objects to a dictionary */
 INLINE void bencode_dictionary_add_integer(bencode_item_t *dict, const char *key, long long int val);
@@ -427,6 +428,12 @@ INLINE void bencode_dictionary_add_str_dup(bencode_item_t *dict, const char *key
 		bencode_dictionary_add(dict, key, bencode_str_dup(bencode_item_buffer(dict), val));
 }
 
+INLINE void bencode_dictionary_add_str_dup_dup(bencode_item_t *dict, const char *key, const str *val) {
+	if (val)
+		bencode_dictionary_add(dict, bencode_strdup(bencode_item_buffer(dict), key),
+				bencode_str_dup(bencode_item_buffer(dict), val));
+}
+
 INLINE void bencode_dictionary_add_integer(bencode_item_t *dict, const char *key, long long int val) {
 	bencode_dictionary_add(dict, key, bencode_integer(bencode_item_buffer(dict), val));
 }