diff -Naur claws-mail-3.13.0.orig/configure claws-mail-3.13.0/configure
--- claws-mail-3.13.0.orig/configure	2015-10-15 11:52:08.604907268 +0300
+++ claws-mail-3.13.0/configure	2015-10-15 11:52:35.098909056 +0300
@@ -14870,7 +14870,7 @@
 
 LIBS=$syl_save_LIBS
 
-ALL_LINGUAS="bg ca cs de en_GB eo es fi fr he hu it lt nb nl pt_BR sk sv zh_TW"
+ALL_LINGUAS="bg ca cs de en_GB eo es fi fr he hu it lt nb nl pt_BR ru sk sv zh_TW"
 GETTEXT_PACKAGE=claws-mail
 
 
diff -Naur claws-mail-3.13.0.orig/configure.ac claws-mail-3.13.0/configure.ac
--- claws-mail-3.13.0.orig/configure.ac	2015-10-15 11:52:08.613907268 +0300
+++ claws-mail-3.13.0/configure.ac	2015-10-15 11:52:46.985909858 +0300
@@ -206,7 +206,7 @@
 LIBS=$syl_save_LIBS
 
 dnl for gettext
-ALL_LINGUAS="bg ca cs de en_GB eo es fi fr he hu it lt nb nl pt_BR sk sv zh_TW"
+ALL_LINGUAS="bg ca cs de en_GB eo es fi fr he hu it lt nb nl pt_BR ru sk sv zh_TW"
 GETTEXT_PACKAGE=claws-mail
 AC_SUBST(GETTEXT_PACKAGE)
 AC_DEFINE_UNQUOTED(GETTEXT_PACKAGE,"$GETTEXT_PACKAGE", [Define text domain.])