diff --git a/source/headermap.txt b/source/headermap.txt
index e2bbb167ed2..4949710aab0 100644
--- a/source/headermap.txt
+++ b/source/headermap.txt
@@ -48,6 +48,7 @@ lib/torture/torture.h: torture.h
 libcli/libcli.h: client.h
 librpc/gen_ndr/nbt.h: gen_ndr/nbt.h
 librpc/gen_ndr/ntp_signd.h: gen_ndr/ntp_signd.h
+librpc/gen_ndr/ndr_ntp_signd.h: gen_ndr/ndr_ntp_signd.h
 librpc/gen_ndr/svcctl.h: gen_ndr/svcctl.h
 librpc/gen_ndr/ndr_svcctl.h: gen_ndr/ndr_svcctl.h
 librpc/gen_ndr/ndr_svcctl_c.h: gen_ndr/ndr_svcctl_c.h