diff --git a/hash.c b/hash.c
index fa323a1f4e..dfc54f0bb9 100644
--- a/hash.c
+++ b/hash.c
@@ -692,6 +692,9 @@ rb_hash_s_create(int argc, VALUE *argv, VALUE klass)
     }
 
     hash = hash_alloc(klass);
+    if (argc > 0) {
+        RHASH(hash)->ntbl = st_init_table_with_size(&objhash, argc / 2);
+    }
     for (i=0; i<argc; i+=2) {
         rb_hash_aset(hash, argv[i], argv[i + 1]);
     }