diff --git a/src/messages/Makefile.am b/src/messages/Makefile.am
index 0a19dad4cee..0f4257bd487 100644
--- a/src/messages/Makefile.am
+++ b/src/messages/Makefile.am
@@ -123,5 +123,6 @@ noinst_HEADERS += \
 	messages/MStatfsReply.h \
 	messages/MTimeCheck.h \
 	messages/MWatchNotify.h \
-	messages/PaxosServiceMessage.h
+	messages/PaxosServiceMessage.h \
+	messages/MNop.h