diff --git a/README b/README
index df1509da..bad03b60 100644
--- a/README
+++ b/README
@@ -137,8 +137,8 @@ Namely:
   * 'f' option directly links to the filtering strength used by the codec's
      in-loop processing. The higher, the smoother will highly-compressed area
      look. This is particularly useful when aiming at very small files.
-     Typical values are around 20-30. Note that you must be using profile 0 or 1
-     to have the in-loop filtering activated.
+     Typical values are around 20-30. Note that using the option -strong will
+     change the type of filtering. Use "-f 0" to turn filtering off.
   * 'm' controls the trade-off between encoding speed and quality. Default is 4.
      You can try -m 5 or -m 6 to explore more (time-consuming) encoding
      possibilities. A lower value will result in faster encoding at the expense