diff --git a/debian/sogo.postrm b/debian/sogo.postrm
index ed570af19..2abe80bd0 100644
--- a/debian/sogo.postrm
+++ b/debian/sogo.postrm
@@ -16,7 +16,7 @@ set -e
 
 case "$1" in
     purge|remove|upgrade|failed-upgrade|abort-install|abort-upgrade|disappear)
-        if test "x$1" == "xpurge" ]
+        if test "x$1" == "xpurge"
         then
             userdel -r sogo || true
         fi
diff --git a/debian/sogo.preinst b/debian/sogo.preinst
index 195c3c220..24864f5d0 100644
--- a/debian/sogo.preinst
+++ b/debian/sogo.preinst
@@ -13,7 +13,7 @@ set -e
 
 if test "x$1" == "xinstall" && test -z "$2"
 then
-  if ! id sogo; then
+  if ! id sogo 2> /dev/null; then
     groupadd -f -K GID_MIN=100 -K GID_MAX=500 sogo
     useradd -d /home/sogo -g sogo -m -K UID_MIN=100 -K UID_MAX=500 -K PASS_MAX_DAYS=-1 -s /bin/bash sogo
   fi