diff --git a/ush/minmon_xtrct_gnorms.pl b/ush/minmon_xtrct_gnorms.pl
index 997ee60ff3..ac83c08cd3 100755
--- a/ush/minmon_xtrct_gnorms.pl
+++ b/ush/minmon_xtrct_gnorms.pl
@@ -185,7 +185,7 @@ sub updateGnormData {
 #
 #---------------------------------------------------------------------------
 
-if ($#ARGV != 4 ) {
+if ($#ARGV != 3 ) {
    print "usage: minmon_xtrct_gnorms.pl SUFFIX pdy cyc infile \n";
    exit;
 }