diff --git a/SPECS/postgresql.spec b/SPECS/postgresql.spec
index f66b7c8..53850f9 100644
--- a/SPECS/postgresql.spec
+++ b/SPECS/postgresql.spec
@@ -72,7 +72,7 @@ Url: http://www.postgresql.org/
 # that this be kept up with the latest minor release of the previous series;
 # but update when bugs affecting pg_dump output are fixed.
 %global prevmajorversion 12
-%global prevversion %{prevmajorversion}.9
+%global prevversion %{prevmajorversion}.18
 %global prev_prefix %{_libdir}/pgsql/postgresql-%{prevmajorversion}
 %global precise_version %{?epoch:%epoch:}%version-%release