diff --git a/source/core.cpp b/source/core.cpp
index 7a6f66d..88b1140 100644
--- a/source/core.cpp
+++ b/source/core.cpp
@@ -497,6 +497,8 @@ export namespace core {
 
 	/**
 	 * Returns a hash code generated from the values in `bytes`.
+	 *
+	 * *Note:* the returned hash code is not guaranteed to be unique.
 	 */
 	constexpr usize hash(slice<u8 const> const & bytes) {
 		usize hash_code = 5381;