diff --git a/lib/IRGen/GenStruct.cpp b/lib/IRGen/GenStruct.cpp
index 8711047d838ae..dbe600ee0160f 100644
--- a/lib/IRGen/GenStruct.cpp
+++ b/lib/IRGen/GenStruct.cpp
@@ -1636,6 +1636,9 @@ void IRGenModule::emitStructDecl(StructDecl *st) {
 }
 
 void IRGenModule::maybeEmitOpaqueTypeDecl(OpaqueTypeDecl *opaque) {
+  if (opaque->getASTContext().LangOpts.hasFeature(Feature::Embedded))
+    return;
+
   if (!opaque->isAvailableDuringLowering())
     return;
 
diff --git a/test/embedded/opaque-return-types.swift b/test/embedded/opaque-return-types.swift
new file mode 100644
index 0000000000000..22af015702880
--- /dev/null
+++ b/test/embedded/opaque-return-types.swift
@@ -0,0 +1,15 @@
+// RUN: %target-swift-emit-ir %s -target %target-cpu-apple-macos14 -enable-experimental-feature Embedded | %FileCheck %s
+
+// REQUIRES: swift_in_compiler
+// REQUIRES: VENDOR=apple
+// REQUIRES: OS=macosx
+
+protocol Proto { }
+
+struct MyStruct: Proto { }
+
+func foo() -> some Proto {
+  MyStruct()
+}
+
+// CHECK: define {{.*}}@main(