diff --git a/ChangeLog b/ChangeLog
index 91a8b507e..161a5d768 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2016-12-12  Peter Stephenson  <p.w.stephenson@ntlworld.com>
+
+	* unposted: Config/version.mk: update to 5.3-dev-0 to avoid
+	clash with installed 5.3.
+
 2016-12-10  Barton E. Schaefer  <schaefer@zsh.org>
 
 	* 40134: Src/builtin.c, Src/Zle/compmatch.c: silence spurious
diff --git a/Config/version.mk b/Config/version.mk
index 45558e39d..f045b7dd1 100644
--- a/Config/version.mk
+++ b/Config/version.mk
@@ -27,5 +27,5 @@
 # This must also serve as a shell script, so do not add spaces around the
 # `=' signs.
 
-VERSION=5.3
-VERSION_DATE='December 11, 2016'
+VERSION=5.3-dev-0
+VERSION_DATE='December 12, 2016'