diff --git a/mingw-w64-crt/revstamp.h b/mingw-w64-crt/revstamp.h
index 4e4f37b..bab0fde 100644
--- a/mingw-w64-crt/revstamp.h
+++ b/mingw-w64-crt/revstamp.h
@@ -1,4 +1,4 @@
 /* Do not edit. Autogenerated.  */
-#define __MINGW_W64_REV	"4523"
+#define __MINGW_W64_REV	"4526"
 #define __MINGW_W64_REV_STAMP "2011-10-04"
 
diff --git a/mingw-w64-headers/crt/_mingw_mac.h b/mingw-w64-headers/crt/_mingw_mac.h
index 0f21779..e5f0120 100644
--- a/mingw-w64-headers/crt/_mingw_mac.h
+++ b/mingw-w64-headers/crt/_mingw_mac.h
@@ -13,7 +13,7 @@
 #define __MINGW64_VERSION_MAJOR	2
 #define __MINGW64_VERSION_MINOR	0
 #define __MINGW64_VERSION_STR	__MINGW64_STRINGIFY(__MINGW64_VERSION_MAJOR) "." __MINGW64_STRINGIFY(__MINGW64_VERSION_MINOR)
-#define __MINGW64_VERSION_STATE	"rc3"
+#define __MINGW64_VERSION_STATE	"rc4"
 
 /* mingw.org's version macros: these make gcc to define
    MINGW32_SUPPORTS_MT_EH and to use the _CRT_MT global