diff --git a/artiq/compiler/embedding.py b/artiq/compiler/embedding.py
index d1b276766..502b364b9 100644
--- a/artiq/compiler/embedding.py
+++ b/artiq/compiler/embedding.py
@@ -564,7 +564,7 @@ class StitchingASTTypedRewriter(ASTTypedRewriter):
         node = asttyped.QuotedFunctionDefT(
             typing_env=extractor.typing_env, globals_in_scope=extractor.global_,
             signature_type=types.TVar(), return_type=types.TVar(),
-            name=node.name, args=node.args, returns=node.returns,
+            name=node.name, args=node.args, returns=None,
             body=node.body, decorator_list=node.decorator_list,
             keyword_loc=node.keyword_loc, name_loc=node.name_loc,
             arrow_loc=node.arrow_loc, colon_loc=node.colon_loc, at_locs=node.at_locs,
diff --git a/artiq/test/lit/embedding/mixed_tuple.py b/artiq/test/lit/embedding/mixed_tuple.py
new file mode 100644
index 000000000..aaf947149
--- /dev/null
+++ b/artiq/test/lit/embedding/mixed_tuple.py
@@ -0,0 +1,16 @@
+# RUN: %python -m artiq.compiler.testbench.embedding %s
+
+from artiq.language.core import *
+from artiq.language.types import *
+
+@kernel
+def consume_tuple(x: TTuple([TInt32, TBool])):
+    print(x)
+
+@kernel
+def return_tuple() -> TTuple([TInt32, TBool]):
+    return (123, False)
+
+@kernel
+def entrypoint():
+    consume_tuple(return_tuple())