diff --git a/.gitignore b/.gitignore
index b6b4606..ed2d801 100644
--- a/.gitignore
+++ b/.gitignore
@@ -52,3 +52,4 @@
 /mingw-w64-mingw-w64-dadc8f83c38992fa4e55e9c90d673c194df70686.zip
 /mingw-w64-mingw-w64-f7337bdf0d70809e720b4e2671758e0c10c16f60.zip
 /mingw-w64-v4.0-rc1.tar.bz2
+/mingw-w64-v4.0-rc3.tar.bz2
diff --git a/0001-Use-a-Guard-defined-by-the-spec-and-not-_POSIX.-This.patch b/0001-Use-a-Guard-defined-by-the-spec-and-not-_POSIX.-This.patch
deleted file mode 100644
index 87d01c4..0000000
--- a/0001-Use-a-Guard-defined-by-the-spec-and-not-_POSIX.-This.patch
+++ /dev/null
@@ -1,35 +0,0 @@
-From c239923641ae52e6c99011c57bc35e86b38f6872 Mon Sep 17 00:00:00 2001
-From: martell <martellmalone@gmail.com>
-Date: Wed, 28 Jan 2015 20:54:58 +0000
-Subject: [PATCH] Use a Guard defined by the spec and not _POSIX. This should
- also guard from windows programs that assume the functions are unavailable
-
----
- mingw-w64-headers/crt/time.h | 4 ++--
- 1 file changed, 2 insertions(+), 2 deletions(-)
-
-diff --git a/mingw-w64-headers/crt/time.h b/mingw-w64-headers/crt/time.h
-index b551a27..7b43fd8 100644
---- a/mingw-w64-headers/crt/time.h
-+++ b/mingw-w64-headers/crt/time.h
-@@ -261,7 +261,7 @@ struct timezone {
- 
- #pragma pack(pop)
- 
--#if defined(_POSIX) || defined(_POSIX_THREAD_SAFE_FUNCTIONS)
-+#if defined(_POSIX_C_SOURCE) || defined(_POSIX_THREAD_SAFE_FUNCTIONS)
- __forceinline struct tm *__cdecl localtime_r(const time_t *_Time, struct tm *_Tm) {
-   return localtime_s(_Tm, _Time) ? NULL : _Tm;
- }
-@@ -274,7 +274,7 @@ __forceinline char *__cdecl ctime_r(const time_t *_Time, char *_Str) {
- __forceinline char *__cdecl asctime_r(const struct tm *_Tm, char * _Str) {
-   return asctime_s(_Str, 0x7fffffff, _Tm) ? NULL : _Str;
- }
--#endif /* _POSIX */
-+#endif /* _POSIX_C_SOURCE */
- 
- /* Adding timespec definition.  */
- #include <sys/timeb.h>
--- 
-2.2.2
-
diff --git a/mingw-headers.spec b/mingw-headers.spec
index a2bd2d5..fbf9b16 100644
--- a/mingw-headers.spec
+++ b/mingw-headers.spec
@@ -3,7 +3,7 @@
 #%%global snapshot_rev_short %(echo %snapshot_rev | cut -c1-6)
 #%%global branch trunk
 
-%global pre rc1
+%global pre rc3
 
 # The mingw-w64-headers provide the headers pthread_time.h
 # and pthread_unistd.h by default and are dummy headers.
@@ -22,7 +22,7 @@
 
 Name:           mingw-headers
 Version:        4.0
-Release:        0.2.%{pre}%{?dist}
+Release:        0.3.%{pre}%{?dist}
 Summary:        Win32/Win64 header files
 
 License:        Public Domain and LGPLv2+ and ZPLv2.1
@@ -46,9 +46,6 @@ Source0:        http://downloads.sourceforge.net/mingw-w64/mingw-w64-v%{version}
 # happening as the .idl files shouldn't be used by default
 Patch0:         mingw-headers-no-widl.patch
 
-# Fix localtime_s and asctime_s compatibility issue
-Patch1:         0001-Use-a-Guard-defined-by-the-spec-and-not-_POSIX.-This.patch
-
 BuildArch:      noarch
 
 BuildRequires:  mingw32-filesystem >= 95
@@ -95,7 +92,6 @@ unzip %{S:0}
 %endif
 
 %patch0 -p0 -b .idl
-%patch1 -p1 -b .posix_time
 
 
 %build
@@ -130,6 +126,9 @@ rm -f $RPM_BUILD_ROOT%{mingw64_includedir}/pthread_unistd.h
 
 
 %changelog
+* Sat Mar  7 2015 Erik van Pienbroek <epienbro@fedoraproject.org> - 4.0-0.3.rc3
+- Update to 4.0rc3
+
 * Wed Jan 28 2015 Erik van Pienbroek <epienbro@fedoraproject.org> - 4.0-0.2.rc1
 - Fix localtime_s and asctime_s compatibility issue
 
diff --git a/sources b/sources
index 892e169..d88edfe 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-67d489701040c624c0d5d6a10248df0d  mingw-w64-v4.0-rc1.tar.bz2
+76eac541947e33614c6014905bce5de5  mingw-w64-v4.0-rc3.tar.bz2