diff --git a/doc/filters.texi b/doc/filters.texi
index 937addf17d..9d6c2b86e5 100644
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -4149,7 +4149,7 @@ Alternatively, the options can be specified as a flat string:
 
 @var{layout}[:@var{nb_frames}[:@var{margin}[:@var{padding}]]]
 
-For example, produce 8×8 PNG tiles of all keyframes (@option{-skip_frame
+For example, produce 8x8 PNG tiles of all keyframes (@option{-skip_frame
 nokey}) in a movie:
 @example
 ffmpeg -skip_frame nokey -i file.avi -vf 'scale=128:72,tile=8x8' -an -vsync 0 keyframes%03d.png
@@ -5543,7 +5543,7 @@ Activate unsafe mode: do not fail if segments have a different format.
 The filter has @var{v}+@var{a} outputs: first @var{v} video outputs, then
 @var{a} audio outputs.
 
-There are @var{n}×(@var{v}+@var{a}) inputs: first the inputs for the first
+There are @var{n}x(@var{v}+@var{a}) inputs: first the inputs for the first
 segment, in the same order as the outputs, then the inputs for the second
 segment, etc.