diff --git a/zenmap/install_scripts/unix/su-to-zenmap.sh b/zenmap/install_scripts/unix/su-to-zenmap.sh
index 677eb7cce..01adf0679 100755
--- a/zenmap/install_scripts/unix/su-to-zenmap.sh
+++ b/zenmap/install_scripts/unix/su-to-zenmap.sh
@@ -40,8 +40,8 @@ else
     fi
     case $SU_TO_ROOT_X in
       gksu) gksu -u "$PRIV" "$COMMAND";;
-      kdesu) kdesu -u "$PRIV" "$COMMAND";;
-      kde4su) /usr/lib/kde4/libexec/kdesu -u "$PRIV" "$COMMAND";;
+      kdesu) kdesu -u "$PRIV" -c "$COMMAND";;
+      kde4su) /usr/lib/kde4/libexec/kdesu -u "$PRIV" -c "$COMMAND";;
       ktsuss) ktsuss -u "$PRIV" "$COMMAND";;
   # As a last resort, open a new xterm use sudo/su
       sdterm) xterm -e "sudo -u $PRIV $COMMAND";;