diff --git a/shell-completion/bash/busctl b/shell-completion/bash/busctl
index c357c25bc32..1ac8ac7ecae 100644
--- a/shell-completion/bash/busctl
+++ b/shell-completion/bash/busctl
@@ -28,20 +28,23 @@ __contains_word () {
 
 __get_machines() {
         local a b
-        machinectl list --no-legend --no-pager | { while read a b; do echo " $a"; done; };
+        machinectl list --no-legend --no-pager 2>/dev/null |
+                { while read a b; do echo " $a"; done; };
 }
 
 __get_busnames() {
         local mode=$1
         local a b
-        busctl $mode list --no-legend --no-pager | { while read a b; do echo " $a"; done; };
+        busctl $mode list --no-legend --no-pager 2>/dev/null |
+                { while read a b; do echo " $a"; done; };
 }
 
 __get_objects() {
         local mode=$1
         local busname=$2
         local a b
-        busctl $mode tree --list --no-legend --no-pager $busname | { while read a b; do echo " $a"; done; };
+        busctl $mode tree --list --no-legend --no-pager $busname 2>/dev/null |
+                { while read a b; do echo " $a"; done; };
 }
 
 __get_interfaces() {
@@ -49,7 +52,8 @@ __get_interfaces() {
         local busname=$2
         local path=$3
         local a b c
-        busctl $mode introspect --list --no-legend --no-pager $busname $path | { while read a b c; do [[ "$b" == "interface" ]] && echo " $a"; done; };
+        busctl $mode introspect --list --no-legend --no-pager $busname $path 2>/dev/null |
+                { while read a b c; do [[ "$b" == "interface" ]] && echo " $a"; done; };
 }
 
 __get_members() {
@@ -60,7 +64,9 @@ __get_members() {
         local type=$5
         local flags=$6
         local a b c d e
-        busctl $mode introspect --list --no-legend --no-pager $busname $path $interface | sed -e 's/^\.//' | { while read a b c d e; do [[ "$b" == "$type" && ( -z $flags || "$e" == "$flags" ) ]] && echo " $a"; done; };
+        busctl $mode introspect --list --no-legend --no-pager $busname $path $interface 2>/dev/null |
+                sed -e 's/^\.//' |
+                { while read a b c d e; do [[ "$b" == "$type" && ( -z $flags || "$e" == "$flags" ) ]] && echo " $a"; done; };
 }
 
 __get_signature() {
@@ -70,7 +76,8 @@ __get_signature() {
         local interface=$4
         local member=$5
         local a b c d
-        busctl $mode introspect --list --no-legend --no-pager $busname $path $interface | sed -e 's/^\.//' | { while read a b c d; do [[ "$a" == "$member" && "$c" != '-' ]] && echo " \"$c\""; done; };
+        busctl $mode introspect --list --no-legend --no-pager $busname $path $interface 2>/dev/null |
+                sed -e 's/^\.//' | { while read a b c d; do [[ "$a" == "$member" && "$c" != '-' ]] && echo " \"$c\""; done; };
 }
 
 _busctl() {