diff --git a/bash_completion b/bash_completion
index f33f85a9..9c3e086a 100644
--- a/bash_completion
+++ b/bash_completion
@@ -470,7 +470,7 @@ _configured_interfaces()
             /etc/network/interfaces )" -- "$cur" ) )
     elif [ -f /etc/SuSE-release ]; then
         # SuSE system
-        COMPREPLY=( $( compgen -W "$( command ls \
+        COMPREPLY=( $( compgen -W "$( printf '%s\n' \
             /etc/sysconfig/network/ifcfg-* | \
             sed -ne 's|.*ifcfg-\(.*\)|\1|p' )" -- "$cur" ) )
     elif [ -f /etc/pld-release ]; then
@@ -480,7 +480,7 @@ _configured_interfaces()
             sed -ne 's|.*ifcfg-\(.*\)|\1|p' )" -- "$cur" ) )
     else
         # Assume Red Hat
-        COMPREPLY=( $( compgen -W "$( command ls \
+        COMPREPLY=( $( compgen -W "$( printf '%s\n' \
             /etc/sysconfig/network-scripts/ifcfg-* | \
             sed -ne 's|.*ifcfg-\(.*\)|\1|p' )" -- "$cur" ) )
     fi
diff --git a/contrib/bluez b/contrib/bluez
index 270effc6..c0b70bc6 100644
--- a/contrib/bluez
+++ b/contrib/bluez
@@ -384,7 +384,7 @@ _hciattach()
         _count_args
         case $args in
             1)
-                COMPREPLY=( $( command ls /dev/tty* ) )
+                COMPREPLY=( $( printf '%s\n' /dev/tty* ) )
                 COMPREPLY=( $( compgen -W '${COMPREPLY[@]} \
                     ${COMPREPLY[@]#/dev/}' -- "$cur" ) )
                 ;;
diff --git a/contrib/minicom b/contrib/minicom
index 199ac0e9..b2ffcb07 100644
--- a/contrib/minicom
+++ b/contrib/minicom
@@ -19,7 +19,7 @@ _minicom()
             return 0
             ;;
         -P)
-            COMPREPLY=( $( command ls /dev/tty* ) )
+            COMPREPLY=( $( printf '%s\n' /dev/tty* ) )
             COMPREPLY=( $( compgen -W '${COMPREPLY[@]} ${COMPREPLY[@]#/dev/}' \
                 -- "$cur" ) )
             return 0
@@ -37,7 +37,7 @@ _minicom()
         [ -n "$( command ls /etc/minicom/minirc.* 2>/dev/null)" ] \
             && confdir=/etc/minicom
         if [ -n "$confdir" ]; then
-            COMPREPLY=( $( compgen -W '$( command ls $confdir/minirc.* | \
+            COMPREPLY=( $( compgen -W '$( printf "%s\n" $confdir/minirc.* | \
                 sed -e "s|$confdir/minirc.||")' -- "$cur" ) )
             return 0
         fi