diff --git a/xorriso/xorriso.1 b/xorriso/xorriso.1
index c8173061..8e904645 100644
--- a/xorriso/xorriso.1
+++ b/xorriso/xorriso.1
@@ -1245,7 +1245,7 @@ Another built-in filter pair is "--gzip" and "--gunzip" with suffix ".gz".
 They behave about like external gzip and gunzip but avoid forking a process
 for each single file. So they are much faster if there are many small files.
 .TP
-\fB\-set_filter_r\fR name isuffix iso_rr_path [***]
+\fB\-set_filter_r\fR name iso_rr_path [***]
 Like -set_filter but affecting all data files below eventual directories.
 .TP
 \fB\-alter_date\fR type timestring iso_rr_path [***]