diff --git a/version.m4 b/version.m4
index 84f7da98..4e1fd3de 100644
--- a/version.m4
+++ b/version.m4
@@ -1,5 +1,5 @@
 dnl define the OpenVPN version
-define(PRODUCT_VERSION,[2.1_rc20])
+define(PRODUCT_VERSION,[2.1_rc20a])
 dnl define the TAP version
 define(PRODUCT_TAP_ID,[tap0901])
 define(PRODUCT_TAP_WIN32_MIN_MAJOR,[9])