diff --git a/lib/Makefile.am b/lib/Makefile.am
index 7edf365d8ee450af14199d351d883a5fc6b6ba87..06ae05df3837159e45001fca1ba3f34f84f7c42b 100644
--- a/lib/Makefile.am
+++ b/lib/Makefile.am
@@ -34,6 +34,7 @@ EXTRA_DIST = Makefile.b32 Makefile.m32 Makefile.vc6 Makefile.riscos	\
  libcurl.framework.make libcurl.plist libcurl.rc config-amigaos.h	\
  amigaos.c amigaos.h makefile.amiga Makefile.netware nwlib.c nwos.c	\
  libcurl.imp msvcproj.head msvcproj.foot config-win32ce.h		\
+ config-os400.h setup-os400.h \
  Makefile.Watcom config-tpf.h $(DOCS) $(VCPROJ)
 
 CLEANFILES = $(DSP) $(VCPROJ)