diff --git a/CMakeLists.txt b/CMakeLists.txt
index cb72bb782ec5..0c2135ffc4d1 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -124,10 +124,12 @@ endif(USE_AVX)
 
 if ((NOT MSVC) AND USE_EPOLL)
   INCLUDE(CheckIncludeFile)
-  check_include_file("sys/epoll.h" USE_EPOLL)
-  if (USE_EPOLL)
+  check_include_file("sys/epoll.h" EPOLL_AVAILABLE)
+  if (EPOLL_AVAILABLE)
     set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -DUSE_EPOLL")
     set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -DUSE_EPOLL")
+  else()
+    message(WARNING "EPOLL is not available on this platform...")
   endif()
 endif ()