diff --git a/src/modules/files/configure.in b/src/modules/files/configure.in
index fd9c36ff1de84914d7a869039833d7271c0940a7..9b50cef7bf4237c8c0d66b3040630600f0feddfe 100644
--- a/src/modules/files/configure.in
+++ b/src/modules/files/configure.in
@@ -6,7 +6,7 @@ sinclude(../module_configure.in)
 AC_HAVE_HEADERS(sys/types.h arpa/inet.h sys/socketvar.h netinet/in.h \
  sys/mount.h ustat.h sys/statfs.h sys/statvfs.h sys/vfs.h sys/param.h \
  sys/socket.h sys/stream.h sys/protosw.h netdb.h sys/sysproto.h winsock.h \
- direct.h sys/wait.h)
+ direct.h sys/wait.h process.h)
 AC_HEADER_DIRENT
 AC_CHECK_LIB(bind, __inet_ntoa)
 AC_CHECK_LIB(socket, socket)