diff --git a/ChangeLog b/ChangeLog
index ed2c18f776..38fecbaab3 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Fri Mar  2 16:37:11 2012  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* file.c (file_expand_path): use wcscasecmp().
+
 Fri Mar  2 16:36:31 2012  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* thread_pthread.c (native_cond_timeout): cast explicitly to suppress
diff --git a/file.c b/file.c
index 38d2ee8ee5..9f3f72a53c 100644
--- a/file.c
+++ b/file.c
@@ -17,6 +17,7 @@
 #ifdef __CYGWIN__
 #include <windows.h>
 #include <sys/cygwin.h>
+#include <wchar.h>
 #endif
 
 #include "ruby/ruby.h"
@@ -3193,7 +3194,7 @@ file_expand_path(VALUE fname, VALUE dname, int abs_mode, VALUE result)
 	    len = lstrlenW(wfd.cFileName);
 #ifdef __CYGWIN__
 	    if (lnk_added && len > 4 &&
-		wcsicmp(wfd.cFileName + len - 4, L".lnk") == 0) {
+		wcscasecmp(wfd.cFileName + len - 4, L".lnk") == 0) {
 		wfd.cFileName[len -= 4] = L'\0';
 	    }
 #else