diff --git a/gcc/cp/typeck.cc b/gcc/cp/typeck.cc
index d5a3e501d8e9121c4d878beddea7c82d9121c2c4..afb956087ce1599118134acefb597c120bd2f5da 100644
--- a/gcc/cp/typeck.cc
+++ b/gcc/cp/typeck.cc
@@ -9630,6 +9630,8 @@ cp_build_modify_expr (location_t loc, tree lhs, enum tree_code modifycode,
 	}
 
       /* Allow array assignment in compiler-generated code.  */
+      else if (DECL_P (lhs) && DECL_ARTIFICIAL (lhs))
+	/* OK, used by coroutines (co-await-initlist1.C).  */;
       else if (!current_function_decl
 	       || !DECL_DEFAULTED_FN (current_function_decl))
 	{
diff --git a/gcc/testsuite/g++.dg/coroutines/co-await-initlist1.C b/gcc/testsuite/g++.dg/coroutines/co-await-initlist1.C
new file mode 100644
index 0000000000000000000000000000000000000000..b8e8923a9c81e336e6826c85429ffe5d4fdfc7bd
--- /dev/null
+++ b/gcc/testsuite/g++.dg/coroutines/co-await-initlist1.C
@@ -0,0 +1,21 @@
+// PR c++/103871
+// { dg-do compile { target c++20 } }
+
+#include <coroutine>
+#include <initializer_list>
+
+struct my_coro {
+  struct promise_type {
+    my_coro get_return_object();
+    std::suspend_never initial_suspend();
+    std::suspend_never final_suspend() noexcept;
+    void unhandled_exception();
+  };
+};
+
+std::suspend_never inner(std::initializer_list<int>);
+
+my_coro doesnt_work()
+{
+  co_await inner({ 1,2,3 });
+}