-F incompatible with -+

diff --git a/flex.1 b/flex.1
index 8698ff84cbd36b457d9d4a8f7ef0abc744be1a39..18713161a16b9a48b64f586f410802c27e2d4366 100644 (file)
--- a/flex.1
+++ b/flex.1
@@ -1715,7 +1715,8 @@ to detect the keywords, you're better off using
 .IP
 This option is equivalent to
 .B \-CFr
-(see below).
+(see below).  It cannot be used with
+.B \-+.
 .TP
 .B \-I
 instructs
@@ -1905,7 +1906,8 @@ specifies that the alternate fast scanner representation (described
 above under the
 .B \-F
 flag)
-should be used.
+should be used.  This option cannot be used with
+.B \-+.
 .IP
 .B \-Cm
 directs