diff --git a/cbits/win_patch.h b/cbits/win_patch.h
--- a/cbits/win_patch.h
+++ b/cbits/win_patch.h
@@ -14,7 +14,7 @@
 #include <pthread.h>
 
 #if defined(_WIN32)
-#include <Windows.h>
+#include <windows.h>
 #endif
 
 #if !defined(TM_YEAR_BASE)
diff --git a/unix-time.cabal b/unix-time.cabal
--- a/unix-time.cabal
+++ b/unix-time.cabal
@@ -1,6 +1,6 @@
 cabal-version:      1.18
 name:               unix-time
-version:            0.4.14
+version:            0.4.15
 license:            BSD3
 license-file:       LICENSE
 maintainer:         Kazu Yamamoto <kazu@iij.ad.jp>