diff --git a/liba52dec.spec b/liba52dec.spec
index 6fc88fb..ec45228 100644
--- a/liba52dec.spec
+++ b/liba52dec.spec
@@ -1,6 +1,6 @@
 Name:          liba52dec
 Version:       0.7.4
-Release:       5mamba
+Release:       6mamba
 Summary:       A library for decoding ATSC A/52 (aka AC-3) audio streams
 Group:         System/Libraries
 Vendor:        openmamba
@@ -9,7 +9,6 @@ Packager:      Silvan Calarco <silvan.calarco@mambasoft.it>
 URL:           http://liba52.sourceforge.net/
 Source:        http://liba52.sf.net/files/a52dec-%{version}.tar.gz
 License:       GPL
-Obsoletes:     a52dec
 ## AUTOBUILDREQ-BEGIN
 BuildRequires: glibc-devel
 ## AUTOBUILDREQ-END
@@ -84,6 +83,9 @@ sed -i "s,| arm-\*  |,| aarch64-\* | arm-\*  |," autotools/config.sub
 %{_mandir}/man1/*
 
 %changelog
+* Fri Dec 04 2020 Silvan Calarco <silvan.calarco@mambasoft.it> 0.7.4-6mamba
+- fix extra obsolete for a52dec
+
 * Thu Dec 03 2020 Silvan Calarco <silvan.calarco@mambasoft.it> 0.7.4-5mamba
 - rebuilt with debug packge and aarch64 build fix