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-rw-r--r--src/libmdsserver/hash-table.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/libmdsserver/hash-table.h b/src/libmdsserver/hash-table.h
index f224401..9b05804 100644
--- a/src/libmdsserver/hash-table.h
+++ b/src/libmdsserver/hash-table.h
@@ -211,7 +211,8 @@ size_t hash_table_get(const hash_table_t* restrict this, size_t key);
* @param this The hash table
* @param key The key of the entry to add
* @param value The value of the entry to add
- * @return The previous value associated with the key, 0 if the key was not used
+ * @return The previous value associated with the key, 0 if the key was not used.
+ * 0 will also be returned on error, check the `errno` variable.
*/
size_t hash_table_put(hash_table_t* restrict this, size_t key, size_t value);