diff --git a/cmake/s390x.cmake b/cmake/s390x.cmake
index af70127ceb4..20d42ab624c 100644
--- a/cmake/s390x.cmake
+++ b/cmake/s390x.cmake
@@ -3,6 +3,10 @@ if(CMAKE_SYSTEM_PROCESSOR MATCHES "^(SystemZ|s390x)")
   set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fsigned-char")
   message(STATUS "Cannot build WAMR on this platform, so WASM support is disabled.")
   set(FLB_WASM OFF)
-  message(STATUS "This platform does not support LuaJIT, so it's disabled.")
-  set(FLB_LUAJIT OFF)
+  if(FLB_LUAJIT)
+    if(NOT FLB_PREFER_SYSTEM_LIB_LUAJIT)
+      message(WARNING "LuaJIT disabled. This platform does not support built in LuaJIT, please install LuaJIT as system lib and try again with FLB_PREFER_SYSTEM_LIB_LUAJIT on.")
+      set(FLB_LUAJIT OFF)
+    endif()
+  endif()
 endif ()