diff --git a/mailman.spec b/mailman.spec
index df86a2c..dbc2f3b 100644
--- a/mailman.spec
+++ b/mailman.spec
@@ -5,7 +5,7 @@
 
 Name:          mailman
 Version:       2.1.24
-Release:       1mamba
+Release:       2mamba
 Summary:       Free software for managing electronic mail discussion and e-newsletter lists
 Group:         System/Servers
 Vendor:        openmamba
@@ -68,7 +68,7 @@ sed -i "s|/usr/bin/env|/bin/env|" bin/msgfmt.py tests/onebounce.py
    --with-permcheck=no \
    --with-var-prefix=/var/mailman \
    --with-cgi-gid=nobody \
-   --with-mail-gid=nobody \
+   --with-mail-gid=mailman \
    --with-mailhost=localhost \
    --with-urlhost=localhost \
    --with-mail-uid=mailman \
@@ -203,6 +203,9 @@ exit 0
 #%doc README ACKNOWLEDGMENTS FAQ BUGS README.* TODO UPGRADING NEWS
 
 %changelog
+* Sat Sep 02 2017 Silvan Calarco <silvan.calarco@mambasoft.it> 2.1.24-2mamba
+- recompile with --with-mail-gid=mailman
+
 * Mon Aug 07 2017 Automatic Build System <autodist@mambasoft.it> 2.1.24-1mamba
 - automatic version update by autodist