diff --git a/.hgtags b/.hgtags
index ac0ad637356d..105c133bc4b3 100644
--- a/.hgtags
+++ b/.hgtags
@@ -89,3 +89,5 @@ b6627f28b7ec17e1b46a594df0f780d3a40847e4 FIREFOX_AURORA_13_BASE
 9155f086562a917e81e3f264941dcba7960e5dda RELEASE_BASE_20121114
 25473a0d2d2db62db2a96142f3436090f13107e8 THUNDERBIRD_17_0_3_RELEASE
 25473a0d2d2db62db2a96142f3436090f13107e8 THUNDERBIRD_17_0_3_BUILD1
+3afd0f349b5419cf35a5bceb2e0474c2a5b3ef18 THUNDERBIRD_17_0_4_RELEASE
+3afd0f349b5419cf35a5bceb2e0474c2a5b3ef18 THUNDERBIRD_17_0_4_BUILD1