diff --git a/debian/DEBIAN/postinst b/debian/DEBIAN/postinst
index 5229124..849f5da 100644
--- a/debian/DEBIAN/postinst
+++ b/debian/DEBIAN/postinst
@@ -240,7 +240,7 @@ fi
 
 # allow supplementary groups
 CAVOLD='^#AllowSupplementaryGroups.*';
-CAVNEW='AllowSupplementaryGroups yes';
+CAVNEW='AllowSupplementaryGroups true';
 if [ -f '/etc/clamav/clamd.conf' ]; then
 	sed -i "s/${CAVOLD}/${CAVNEW}/g" /etc/clamav/clamd.conf
 fi