diff --git a/stdlib/cmake/modules/StdlibOptions.cmake b/stdlib/cmake/modules/StdlibOptions.cmake
index 3fc9813675167..1116df016a8cb 100644
--- a/stdlib/cmake/modules/StdlibOptions.cmake
+++ b/stdlib/cmake/modules/StdlibOptions.cmake
@@ -247,7 +247,7 @@ if(SWIFT_ENABLE_EXPERIMENTAL_CONCURRENCY AND "${SWIFT_CONCURRENCY_GLOBAL_EXECUTO
   set(SWIFT_CONCURRENCY_USES_DISPATCH TRUE)
 endif()
 
-if(SWIFT_CONCURRENCY_USES_DISPATCH)
+if(SWIFT_CONCURRENCY_USES_DISPATCH AND NOT CMAKE_SYSTEM_NAME STREQUAL Darwin)
   if(NOT EXISTS "${SWIFT_PATH_TO_LIBDISPATCH_SOURCE}")
     message(SEND_ERROR "Concurrency require libdispatch on non-Darwin hosts.  Please specify SWIFT_PATH_TO_LIBDISPATCH_SOURCE")
   endif()