diff --git a/usr/share/install_helper.sh b/usr/share/install_helper.sh
index 6dc1e6e..dc30b7a 100644
--- a/usr/share/install_helper.sh
+++ b/usr/share/install_helper.sh
@@ -34,7 +34,7 @@ set -u
 TELEBIT_DEBUG=${TELEBIT_DEBUG:-}
 
 # NOTE: On OS X logname works from a pipe, but on Linux it does not
-if [ -n "$(logname >2/dev/null | grep '.')" ] && [ "$(logname)" != "$(id -u -n)" ]; then
+if [ -n "$(logname 2>/dev/null | grep '.')" ] && [ "$(logname)" != "$(id -u -n)" ]; then
   echo "WARNING:"
   echo "    You are logged in as '$(logname)' but acting as '$(id -u -n)'."
   echo "    If the installation is not successful please log in as '$(id -u -n)' directly."