diff --git a/doc/zzuf.1 b/doc/zzuf.1
index 30eeef0..d8ce87a 100644
--- a/doc/zzuf.1
+++ b/doc/zzuf.1
@@ -236,10 +236,10 @@ As of now, \fBzzuf\fR does not really support multithreaded applications. The
 behaviour with multithreaded applications where more than one thread does file
 descriptor operations is undefined. This bug will be fixed.
 .PP
-Though best efforts are made, the reproducibility of \fBzzuf\fR's behaviour
-is guaranteed for subsequent calls with the same settings on different
-operating systems, with different target programs, but not for calls with
-different versions of \fBzzuf\fR.
+Though best efforts are made, identical behaviour for different versions of
+\fBzzuf\fR is not guaranteed. Only the reproducibility for subsequent calls
+with the same \fBzzuf\fR version on different operating systems and with
+different target programs is guaranteed.
 .SH AUTHOR
 .PP
 Copyright \(co 2006, 2007 Sam Hocevar <sam@zoy.org>.