diff --git a/AK/HashTable.h b/AK/HashTable.h
index 81d930d0b2..6af8dff5a3 100644
--- a/AK/HashTable.h
+++ b/AK/HashTable.h
@@ -87,7 +87,7 @@ class HashTable {
 
 public:
     HashTable() = default;
-    HashTable(size_t capacity) { rehash(capacity); }
+    explicit HashTable(size_t capacity) { rehash(capacity); }
 
     ~HashTable()
     {