diff --git a/ChangeLog b/ChangeLog
index b3fd11eb..534c4f61 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+1999-05-26  Martin Baulig  <martin@home-of-linux.org>
+
+	* configure.in (INCLUDES): Define `LIBGTOP_VERSION_CODE' here so we
+	can use version conditionals in the sysdeps code.
+
 1999-05-25  Martin Baulig  <martin@home-of-linux.org>
 
 	* libgtop-sysdeps.m4: Make the I4B check work for NetBSD.
diff --git a/configure.in b/configure.in
index bf6df29f..e3ca7ae4 100644
--- a/configure.in
+++ b/configure.in
@@ -365,7 +365,7 @@ else
   guile_def=""
 fi
 
-INCLUDES="-D_IN_LIBGTOP -D_GNU_SOURCE -DGLIBTOP_NAMES -I\$(top_builddir) -I\$(top_srcdir) -I\$(top_srcdir)/sysdeps/$sysdeps_dir -I\$(top_srcdir)/include -I\$(top_srcdir)/intl $SUPPORTINCS $GLIB_CFLAGS $CFLAGS $X_CFLAGS $guile_def "'-DGTOPLOCALEDIR=\"$(datadir)/locale\" -DLIBGTOP_VERSION=\"'"$LIBGTOP_VERSION"'\" -DLIBGTOP_SERVER_VERSION=\"'"$LIBGTOP_SERVER_VERSION"'\" -DLIBGTOP_SERVER=\"'"$LIBGTOP_SERVER"'\"'
+INCLUDES="-D_IN_LIBGTOP -D_GNU_SOURCE -DGLIBTOP_NAMES -I\$(top_builddir) -I\$(top_srcdir) -I\$(top_srcdir)/sysdeps/$sysdeps_dir -I\$(top_srcdir)/include -I\$(top_srcdir)/intl $SUPPORTINCS $GLIB_CFLAGS $CFLAGS $X_CFLAGS $guile_def "'-DGTOPLOCALEDIR=\"$(datadir)/locale\" -DLIBGTOP_VERSION=\"'"$LIBGTOP_VERSION"'\" -DLIBGTOP_SERVER_VERSION=\"'"$LIBGTOP_SERVER_VERSION"'\" -DLIBGTOP_VERSION_CODE='$LIBGTOP_VERSION_CODE' -DLIBGTOP_SERVER=\"'"$LIBGTOP_SERVER"'\"'
 
 AC_SUBST(INCLUDES)