convert(): Fix undefined $output in eq

1 files changed, 1 insertions, 1 deletions

diff --git a/bin/bdf2fbcon b/bin/bdf2fbcon
index 7f50dcf..5c7a9c4 100755
--- a/bin/bdf2fbcon
+++ b/bin/bdf2fbcon
@@ -263,7 +263,7 @@ sub convert
 	my $line;
 	my $font;
 
-	if ($input eq $output and $input ne '-') {
+	if ($input eq ($output or '') and $input ne '-') {
 		warning('Input and output files are equal');
 	}