--- libs/imap/mkdhparams.in.orig	2015-04-27 14:11:25.000000000 +0200
+++ libs/imap/mkdhparams.in	2020-04-26 17:12:26.338330000 +0200
@@ -37,7 +37,7 @@
 umask 077
 cp /dev/null $TLS_DHPARAMS.tmp
 umask 022
-chown @mailuser@ $TLS_DHPARAMS.tmp
+/usr/sbin/chown @mailuser@ $TLS_DHPARAMS.tmp
 
 BITS="$DH_BITS"
 if test "@ssllib@" = "openssl"