diff --git a/include/Makefile.in b/include/Makefile.in
index f131cba..d4f6cad 100644
--- a/include/Makefile.in
+++ b/include/Makefile.in
@@ -340,6 +340,7 @@
   $(wildcard ndn-cpp/security/encryption/*.*) \
   $(wildcard ndn-cpp/security/identity/*.*) \
   $(wildcard ndn-cpp/security/policy/*.*) \
+  $(wildcard ndn-cpp/security/signature/*.*) \
   $(wildcard ndn-cpp/transport/*.*) \
   $(wildcard ndn-cpp/util/*.*)