diff --git a/Makefile.am b/Makefile.am
index efc92121..748dfc2a 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -1256,6 +1256,7 @@ EXTRA_DIST = xml2-config.in xml2Conf.sh.in libxml.spec.in libxml2.spec \
 	     enc.h save.h testThreadsWin32.c genUnicode.py TODO_SCHEMAS \
 	     dbgen.pl dbgenattr.pl regressions.py regressions.xml \
 	     README.tests Makefile.tests libxml2.syms timsort.h \
+	     README.zOS \
 	     $(CVS_EXTRA_DIST)