diff --git a/spec/fixtures/windows_stat_native.c b/spec/fixtures/windows_stat_native.c
index a1352a3..83144bb 100644
--- a/spec/fixtures/windows_stat_native.c
+++ b/spec/fixtures/windows_stat_native.c
@@ -91,11 +91,7 @@ test_socket (int af, int type, int protocol)
 #define CreateFileW test_create_file
 #define GetFileInformationByHandle test_file_information
 #define FindFirstFileExW test_find_file
-#define EV_STANDALONE 1
-#define EV_USE_REALTIME 0
-#define EV_USE_MONOTONIC 0
-#define EV_WIN32_STAT_CODEPAGE CP_UTF8
-#include "ev.c"
+#include "libev.c"
 #undef socket
 #undef GetQueuedCompletionStatus
 #undef CreateFileW
diff --git a/spec/windows_stat_native_spec.rb b/spec/windows_stat_native_spec.rb
index da76428..e320f4d 100644
--- a/spec/windows_stat_native_spec.rb
+++ b/spec/windows_stat_native_spec.rb
@@ -7,7 +7,7 @@
   before(:context) do
     @build = Dir.mktmpdir('coolio-stat-native-')
     source = File.expand_path('fixtures/windows_stat_native.c', __dir__)
-    libev = File.expand_path('../ext/libev', __dir__)
+    coolio = File.expand_path('../ext/cool.io', __dir__)
     FileUtils.cp(source, @build)
     File.write(File.join(@build, 'extconf.rb'), <<~RUBY)
       begin
@@ -16,7 +16,7 @@
         # Other Windows toolchains can provide the compiler through PATH.
       end
       require 'mkmf'
-      $INCFLAGS << ' -I"#{libev}"'
+      $INCFLAGS << ' -I"#{coolio}"'
       abort 'ws2_32 is required' unless have_library('ws2_32')
       create_makefile('coolio_stat_native')
     RUBY