--- a/old-configure.in
+++ b/old-configure.in
@@ -5392,16 +5392,17 @@ if test "$ACCESSIBILITY" -a "$MOZ_ENABLE
     ATK_MAJOR_VERSION=`echo ${ATK_FULL_VERSION} | $AWK -F\. '{ print $1 }'`
     ATK_MINOR_VERSION=`echo ${ATK_FULL_VERSION} | $AWK -F\. '{ print $2 }'`
     ATK_REV_VERSION=`echo ${ATK_FULL_VERSION} | $AWK -F\. '{ print $3 }'`
     AC_DEFINE_UNQUOTED(ATK_MAJOR_VERSION, $ATK_MAJOR_VERSION)
     AC_DEFINE_UNQUOTED(ATK_MINOR_VERSION, $ATK_MINOR_VERSION)
     AC_DEFINE_UNQUOTED(ATK_REV_VERSION, $ATK_REV_VERSION)
 fi
 
+AC_SUBST(MOZ_DEV_EDITION)
 if test -n "$MOZ_DEV_EDITION"; then
     AC_DEFINE(MOZ_DEV_EDITION)
 fi
 
 if test "$MOZ_DEBUG"; then
     A11Y_LOG=1
 fi
 case "$MOZ_UPDATE_CHANNEL" in