diff --git a/main.c b/main.c
index 473b8d4..47b6c57 100644
--- a/main.c
+++ b/main.c
@@ -30,7 +30,7 @@ void newPerson(person *p, const char *name) {
 }
 
 void insert(person **head, person *node) {
-  if (head == NULL) {
+  if (*head == NULL) {
     *head = node;
   } else {
     person *p = *head;
@@ -122,7 +122,7 @@ u_long hash(const unsigned char *str) {
 }
 
 void hm_insert(person **hashmap, char *name) {
-  u_long hash_value = hash(name);
+  u_long hash_value = hash((unsigned char *)name);
   hash_value = hash_value % HASH_BUCKETS;
   sorted_name_insert(&hashmap[hash_value], name);
 }
@@ -187,6 +187,7 @@ void make_list(person **hashmap, person **list, const int min_count) {
       }
       p = p_next;
     }
+    hashmap[i] = NULL;
   }
   free(hashmap);
 }