diff --git a/erlang.spec b/erlang.spec
index e3b55aa..6fbba7e 100644
--- a/erlang.spec
+++ b/erlang.spec
@@ -956,7 +956,7 @@ Erlang mode for XEmacs (source lisp files).
 %endif
 
 %prep
-%setup -q -n otp_src_%{upstream_ver}%{upstream_rel}
+%setup -q -n otp_src_%{upstream_ver}%{upstream_rel}-1
 
 # start of autogenerated prep patch list
 %patch1 -p1 -b .Do_not_format_man_pages_and_do_not_install_miscellan