Handle argument being an empty string in the same way as undefined

1 files changed, 1 insertions, 1 deletions

diff --git a/unixtime.pl b/unixtime.pl
index f47cf9f..ca99311 100755
--- a/unixtime.pl
+++ b/unixtime.pl
@@ -2,7 +2,7 @@
 use POSIX qw( strftime );
 use Time::HiRes qw( gettimeofday );
 
-if (defined $ARGV[0]) {
+if (defined $ARGV[0] and $ARGV ne "") {
     if ($ARGV[1] eq "ms") {
         #Convert from timestamp in milliseconds to date
         $seconds = substr $ARGV[0], 0, 10;