diff --git a/py/runtime.c b/py/runtime.c
index e45591bbe2..c6a85bb01e 100644
--- a/py/runtime.c
+++ b/py/runtime.c
@@ -671,6 +671,7 @@ void mp_call_prepare_args_n_kw_var(bool have_self, mp_uint_t n_args_n_kw, const
 
         // copy the fixed position args
         mp_seq_copy(args2 + args2_len, args, n_args, mp_obj_t);
+        args2_len += n_args;
 
         // extract the variable position args from the iterator
         mp_obj_t iterable = mp_getiter(pos_seq);
diff --git a/tests/basics/fun_callstar.py b/tests/basics/fun_callstar.py
index 255563b26b..2275d3d4fc 100644
--- a/tests/basics/fun_callstar.py
+++ b/tests/basics/fun_callstar.py
@@ -14,6 +14,9 @@ foo(1, 2, *[100])
 # Iterator
 foo(*range(3))
 
+# pos then iterator
+foo(1, *range(2, 4))
+
 # method calls with *pos
 
 class A: