diff --git a/configure.ac b/configure.ac
index 5414963c..ebe30e92 100644
--- a/configure.ac
+++ b/configure.ac
@@ -856,14 +856,19 @@ AM_CONDITIONAL(HAVE_UISERVER, test "$uiserver" != "no")
 
 
 # Generate values for the DLL version info
+
+dnl Windows uses an internal build number.  We use the last day of the
+dnl year concatenated with the hour for it.  WARNING: You should not
+dnl do a build with the same version number in another year.
 if test "$have_w32_system" = yes; then
     BUILD_TIMESTAMP=`date --iso-8601=minutes`
+    BUILD_NUMBER="$(date -u '+%j%H' | sed 's/^0*\(.*\)/\1/')"
     changequote(,)dnl
     BUILD_FILEVERSION=`echo "$VERSION" | sed 's/\([0-9.]*\).*/\1./;s/\./,/g'`
     changequote([,])dnl
-    BUILD_FILEVERSION="${BUILD_FILEVERSION}${BUILD_REVISION}"
+    BUILD_FILEVERSION="${BUILD_FILEVERSION}${BUILD_NUMBER}"
 fi
-AC_SUBST(BUILD_REVISION)
+AC_SUBST(BUILD_NUMBER)
 AC_SUBST(BUILD_TIMESTAMP)
 AC_SUBST(BUILD_FILEVERSION)
 
diff --git a/src/versioninfo.rc.in b/src/versioninfo.rc.in
index bfb652e1..9c1b4f50 100644
--- a/src/versioninfo.rc.in
+++ b/src/versioninfo.rc.in
@@ -1,6 +1,6 @@
 /* versioninfo.rc.in - for gpgme
  *    Copyright (C) 2005 g10 Code GmbH
- * 
+ *
  * This file is free software; as a special exception the author gives
  * unlimited permission to copy and/or distribute it, with or without
  * modifications, as long as this notice is preserved.
@@ -9,7 +9,7 @@
  * WITHOUT ANY WARRANTY, to the extent permitted by law; without even the
  * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  */
- 
+
 /* This file is processed by configure to create versioninfo.rc */
 
 #line __LINE__ "versioninfo.rc.in"
@@ -18,7 +18,7 @@
 
 
 VS_VERSION_INFO VERSIONINFO
- FILEVERSION @LIBGPGME_LT_CURRENT@,@LIBGPGME_LT_AGE@,@LIBGPGME_LT_REVISION@,@BUILD_REVISION@
+ FILEVERSION @LIBGPGME_LT_CURRENT@,@LIBGPGME_LT_AGE@,@LIBGPGME_LT_REVISION@,@BUILD_NUMBER@
  PRODUCTVERSION @BUILD_FILEVERSION@
  FILEFLAGSMASK 0x3fL
 #ifdef _DEBUG
@@ -37,7 +37,7 @@ BEGIN
             VALUE "Comments", "Provided under the terms of the GNU Lesser General Public License.\0"
             VALUE "CompanyName", "g10 Code GmbH\0"
             VALUE "FileDescription", "GPGME - GnuPG Made Easy\0"
-            VALUE "FileVersion", "@LIBGPGME_LT_CURRENT@.@LIBGPGME_LT_AGE@.@LIBGPGME_LT_REVISION@.@BUILD_REVISION@\0"
+            VALUE "FileVersion", "@LIBGPGME_LT_CURRENT@.@LIBGPGME_LT_AGE@.@LIBGPGME_LT_REVISION@.@BUILD_NUMBER@\0"
             VALUE "InternalName", "gpgme\0"
             VALUE "LegalCopyright", "Copyright © 2005 g10 Code GmbH\0"
             VALUE "LegalTrademarks", "\0"