diff --git a/bin/feedgnuplot b/bin/feedgnuplot
index f380bab..28baf8a 100755
--- a/bin/feedgnuplot
+++ b/bin/feedgnuplot
@@ -1143,9 +1143,12 @@ As an example, if line 3 of the input is "0 9 1 20"
                        debugging. It is possible to send the output produced this way to
                        gnuplot directly.
 
-  --exit               Exit the feedgnuplot process after passing data to gnuplot. With
-                       gnuplot versions >= 4.3 the window will persist but will not be
-                       interactive.
+  --exit               Terminate the feedgnuplot process after passing data to
+                       gnuplot. The window will persist but will not be
+                       interactive. Without this option feedgnuplot keeps running
+                       and must be killed by the user. Note that this option works
+                       only with later versions of gnuplot and only with some
+                       gnuplot terminals.
 
   --geometry           If using X11, specifies the size, position of the plot window