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-rw-r--r--tools/upgrade.sh3
1 files changed, 1 insertions, 2 deletions
diff --git a/tools/upgrade.sh b/tools/upgrade.sh
index 6e9696202..fe8fbadca 100644
--- a/tools/upgrade.sh
+++ b/tools/upgrade.sh
@@ -1,8 +1,7 @@
# Use colors, but only if connected to a terminal, and that terminal
# supports them.
-tput=$(which tput)
-if [ -n "$tput" ]; then
+if which tput >/dev/null 2>&1; then
ncolors=$(tput colors)
fi
if [ -t 1 ] && [ -n "$ncolors" ] && [ "$ncolors" -ge 8 ]; then