diff --git a/tests/rigswr.1 b/tests/rigswr.1
index e37c52ad3..e94d55832 100644
--- a/tests/rigswr.1
+++ b/tests/rigswr.1
@@ -109,7 +109,7 @@ Result could then be ploted with gnuplot:
 .br
 gnuplot
 .br
-set date style linespoints
+set data style linespoints
 .br
 set grid
 .br