diff --git a/configure/tools/fullPathName.pl b/configure/tools/fullPathName.pl
index 17d04c4a8..e2585a22b 100755
--- a/configure/tools/fullPathName.pl
+++ b/configure/tools/fullPathName.pl
@@ -3,6 +3,8 @@ eval 'exec perl -S -w  $0 ${1+"$@"}'  # -*- Mode: perl -*-
 
 use Cwd 'abs_path';
 my $dir;
-$dir = abs_path("$ARGV[0]");
-print "$dir\n";
-
+if( $ARGV[0] )
+{
+  $dir = abs_path("$ARGV[0]");
+  print "$dir\n";
+}