diff --git a/packages/Makefile.am b/packages/Makefile.am
index 9a2af064da..bfa096be54 100644
--- a/packages/Makefile.am
+++ b/packages/Makefile.am
@@ -6,6 +6,7 @@ EXTRA_DIST = README \
   OS400/README.OS400 \
   OS400/ccsidcurl.c \
   OS400/ccsidcurl.h \
+  OS400/chkstrings.c \
   OS400/curl.inc.in \
   OS400/initscript.sh \
   OS400/make-include.sh \