diff --git a/src/trie.c b/src/trie.c
index 3f9066db..f2800485 100644
--- a/src/trie.c
+++ b/src/trie.c
@@ -892,6 +892,12 @@ uint32_t trie_get(trie_t *self, char *word) {
     return trie_get_from_index(self, word, word_len, ROOT_NODE_ID);
 }
 
+
+inline uint32_t trie_num_keys(trie_t *self) {
+    if (self == NULL) return 0;
+    return self->num_keys;
+}
+
 /*
 Destructor
 */
diff --git a/src/trie.h b/src/trie.h
index 1d673a66..4582fd91 100644
--- a/src/trie.h
+++ b/src/trie.h
@@ -124,6 +124,8 @@ uint32_t trie_get_from_index(trie_t *self, char *word, size_t len, uint32_t i);
 uint32_t trie_get_len(trie_t *self, char *word, size_t len);
 uint32_t trie_get(trie_t *self, char *word);
 
+uint32_t trie_num_keys(trie_t *self);
+
 typedef struct trie_prefix_result {
     uint32_t node_id;
     size_t tail_pos;