--- a/configure.in
+++ b/configure.in
@@ -1810,17 +1810,17 @@ FIREFOX_VERSION=`cat $_topsrcdir/browser
 
 if test -z "$FIREFOX_VERSION"; then
     AC_MSG_ERROR([FIREFOX_VERSION is unexpectedly blank.])
 fi
 
 AC_DEFINE_UNQUOTED(MOZILLA_VERSION,"$MOZILLA_VERSION")
 AC_DEFINE_UNQUOTED(MOZILLA_VERSION_U,$MOZILLA_VERSION)
 AC_DEFINE_UNQUOTED(MOZILLA_UAVERSION,"$MOZILLA_UAVERSION")
-AC_DEFINE_UNQUOTED(MOZILLA_SYMBOLVERSION,"$MOZILLA_SYMBOLVERSION")
+AC_SUBST(MOZILLA_SYMBOLVERSION)
 
 MOZ_DOING_LTO(lto_is_enabled)
 
 dnl ========================================================
 dnl System overrides of the defaults for target
 dnl ========================================================
 
 case "$target" in

--- a/js/src/configure.in
+++ b/js/src/configure.in
@@ -222,17 +222,17 @@ dnl Get mozilla version from central mil
 dnl ==============================================================
 MOZILLA_VERSION=`$PERL $srcdir/config/milestone.pl -topsrcdir $srcdir`
 MOZILLA_UAVERSION=`$PERL $srcdir/config/milestone.pl -topsrcdir $srcdir -uaversion`
 MOZILLA_SYMBOLVERSION=`$PERL $srcdir/config/milestone.pl -topsrcdir $srcdir -symbolversion`
 
 AC_DEFINE_UNQUOTED(MOZILLA_VERSION,"$MOZILLA_VERSION")
 AC_DEFINE_UNQUOTED(MOZILLA_VERSION_U,$MOZILLA_VERSION)
 AC_DEFINE_UNQUOTED(MOZILLA_UAVERSION,"$MOZILLA_UAVERSION")
-AC_DEFINE_UNQUOTED(MOZILLA_SYMBOLVERSION,"$MOZILLA_SYMBOLVERSION")
+AC_SUBST(MOZILLA_SYMBOLVERSION)
 
 # Separate version into components for use in shared object naming etc
 changequote(,)
 MOZJS_MAJOR_VERSION=`echo $MOZILLA_VERSION | sed "s|\(^[0-9]*\)\.[0-9]*.*|\1|"`
 MOZJS_MINOR_VERSION=`echo $MOZILLA_VERSION | sed "s|^[0-9]*\.\([0-9]*\).*|\1|"`
 MOZJS_PATCH_VERSION=`echo $MOZILLA_VERSION | sed "s|^[0-9]*\.[0-9]*[^0-9]*||"`
 IS_ALPHA=`echo $MOZILLA_VERSION | grep [ab]`