diff --git a/runchecks b/runchecks
line changes: +4/-0
index 3467c28..535fa68
--- a/runchecks
+++ b/runchecks

@@ -2,6 +2,10 @@
 use strict;
 
 my $dir = shift;
+unless ($dir) {
+	print "No directory specified\n";
+	exit 1;
+}
 unless (-d $dir) {
 	print "$dir is not a directory\n";
 	exit 1;