diff --git a/stdlib/public/SwiftShims/swift/shims/_SwiftConcurrency.h b/stdlib/public/SwiftShims/swift/shims/_SwiftConcurrency.h
index a70b178a4da21..30ba154dfe53e 100644
--- a/stdlib/public/SwiftShims/swift/shims/_SwiftConcurrency.h
+++ b/stdlib/public/SwiftShims/swift/shims/_SwiftConcurrency.h
@@ -25,13 +25,16 @@ typedef struct _SwiftContext {
   struct _SwiftContext *parentContext;
 } _SwiftContext;
 
-void exit(int);
-
-#define EXIT_SUCCESS 0
-
 #ifdef __cplusplus
 } // extern "C"
 } // namespace swift
 #endif
 
+#ifdef __cplusplus
+extern "C" [[noreturn]]
+#endif
+void exit(int);
+
+#define EXIT_SUCCESS 0
+
 #endif // SWIFT_CONCURRENCY_H
diff --git a/test/Interop/Cxx/stdlib/print-swiftconcurrencyshims-interface.swift b/test/Interop/Cxx/stdlib/print-swiftconcurrencyshims-interface.swift
new file mode 100644
index 0000000000000..7ed9355c89c25
--- /dev/null
+++ b/test/Interop/Cxx/stdlib/print-swiftconcurrencyshims-interface.swift
@@ -0,0 +1,10 @@
+// RUN: %target-swift-ide-test -print-module -module-to-print=_SwiftConcurrencyShims -source-filename=x -enable-experimental-cxx-interop | %FileCheck %s
+// RUN: %target-swift-ide-test -print-module -module-to-print=_SwiftConcurrencyShims -source-filename=x | %FileCheck %s
+
+// REQUIRES: concurrency
+
+// Ensure that _SwiftConcurrencyShims defines the same `exit` regardless of whether
+// C++ interoperability is enabled.
+
+// CHECK: func exit(_: Int32) -> Never
+// CHECK: var EXIT_SUCCESS: Int32 { get }