diff --git a/winsup/mingw/ChangeLog b/winsup/mingw/ChangeLog
index 2e740b5fd..670096ac5 100644
--- a/winsup/mingw/ChangeLog
+++ b/winsup/mingw/ChangeLog
@@ -1,4 +1,9 @@
 
+2001-06-04  Earnie Boyd  <earnie@users.sourceforge.net>
+
+	* include/_mingw.h: Change version to 1.0.
+	Makefile.in: Ditto.
+
 2000-02-21  Earnie Boyd  <earnie@users.sourceforge.net>
 
 	* include/tchar.h: (__TEXT): Remove undef.
diff --git a/winsup/mingw/Makefile.in b/winsup/mingw/Makefile.in
index 561cab83a..d2f384ca1 100644
--- a/winsup/mingw/Makefile.in
+++ b/winsup/mingw/Makefile.in
@@ -18,7 +18,7 @@
 # This makefile requires GNU make.
 
 PACKAGE = mingw-runtime
-VERSION = 0.5
+VERSION = 1.0
 
 VPATH = @srcdir@
 srcdir = @srcdir@
diff --git a/winsup/mingw/include/_mingw.h b/winsup/mingw/include/_mingw.h
index 0a492705c..c8774e71a 100644
--- a/winsup/mingw/include/_mingw.h
+++ b/winsup/mingw/include/_mingw.h
@@ -60,9 +60,9 @@
 # define __int64 long long
 #endif /* __GNUC__ */
 
-#define __MINGW32_VERSION 0.5
-#define __MINGW32_MAJOR_VERSION 0
-#define __MINGW32_MINOR_VERSION 5
+#define __MINGW32_VERSION 1.0
+#define __MINGW32_MAJOR_VERSION 1
+#define __MINGW32_MINOR_VERSION 0
 
 #endif /* __MINGW_H */