diff --git a/plexupdate.sh b/plexupdate.sh
index c49cfcf..5232aee 100755
--- a/plexupdate.sh
+++ b/plexupdate.sh
@@ -229,7 +229,7 @@ if [ "${AUTOUPDATE}" = "yes" ]; then
 		warn "You have made changes to the plexupdate files, cannot auto update"
 	else
 		# Force FETCH_HEAD to point to the correct branch (for older versions of git which don't default to current branch)
-		if git fetch origin $BRANCHNAME --quiet && ! git diff --quiet FETCH_HEAD; then
+		if git fetch origin ${BRANCHNAME:-master} --quiet && ! git diff --quiet FETCH_HEAD; then
 			info "Auto-updating..."
 
 			# Use an associative array to store permissions. If you're running bash < 4, the declare will fail and we'll