diff --git a/mozilla/include/MANIFEST b/mozilla/include/MANIFEST
index 67fb1169305..e2071c873e5 100644
--- a/mozilla/include/MANIFEST
+++ b/mozilla/include/MANIFEST
@@ -92,6 +92,7 @@ xp_mesg.h
 xp_ncent.h
 xp_path.h
 xp_qsort.h
+xp_regexp.h
 xp_rgb.h
 xp_sock.h
 xp_str.h