diff --git a/include/Makefile.am b/include/Makefile.am
index 24a83cf..522d375 100644
--- a/include/Makefile.am
+++ b/include/Makefile.am
@@ -10,6 +10,7 @@ noinst_HEADERS += compat/dirent_msvc.h
 noinst_HEADERS += compat/err.h
 noinst_HEADERS += compat/netdb.h
 noinst_HEADERS += compat/poll.h
+noinst_HEADERS += compat/readpassphrase.h
 noinst_HEADERS += compat/stdio.h
 noinst_HEADERS += compat/stdlib.h
 noinst_HEADERS += compat/string.h