diff --git a/src/address_dictionary.c b/src/address_dictionary.c
index 0214c83e..b0d5e345 100644
--- a/src/address_dictionary.c
+++ b/src/address_dictionary.c
@@ -22,6 +22,18 @@ address_expansion_array *address_dictionary_get_expansions(char *key) {
     return k != kh_end(address_dict->expansions) ? kh_value(address_dict->expansions, k) : NULL;
 }
 
+inline bool address_expansion_in_dictionary(address_expansion_t expansion, uint16_t dictionary_id) {
+    for (uint32_t i = 0; i < expansion.num_dictionaries; i++) {
+        if (expansion.dictionary_ids[i] == dictionary_id) {
+             return true;
+        }
+    }
+
+    return false;
+}
+
+
+
 int32_t address_dictionary_next_canonical_index(void) {
     if (address_dict == NULL || address_dict->canonical == NULL) {
         log_error(ADDRESS_DICTIONARY_SETUP_ERROR);
diff --git a/src/address_dictionary.h b/src/address_dictionary.h
index b7e1fa06..c174b002 100644
--- a/src/address_dictionary.h
+++ b/src/address_dictionary.h
@@ -67,6 +67,7 @@ phrase_t search_address_dictionaries_prefix(char *str, size_t len, char *lang);
 phrase_t search_address_dictionaries_suffix(char *str, size_t len, char *lang);
 
 address_expansion_array *address_dictionary_get_expansions(char *key);
+bool address_expansion_in_dictionary(address_expansion_t expansion, uint16_t dictionary_id);
 char *address_dictionary_get_canonical(uint32_t index);
 int32_t address_dictionary_next_canonical_index(void);
 bool address_dictionary_add_canonical(char *canonical);