diff --git a/doc/software-manual.tex b/doc/software-manual.tex
index dfac8818c800d6d63994cf8c52104823750efd96..248ae055c26eb2cf8a137ae9d4819615cbe04407 100644
--- a/doc/software-manual.tex
+++ b/doc/software-manual.tex
@@ -2891,7 +2891,7 @@ Value shall be in the range 1..8.
 \Option{ALFStrength} &
 %\ShortOption{\None} &
 \Default{1.0} &
-Enables control of ALF filter strength. The parameter scales the magnitudes of the ALF filter coefficients for both luma and chroma.
+Enables control of ALF filter strength. The parameter scales the magnitudes of the ALF filter coefficients for both luma and chroma. Typical range of the parameter is between 0 and 1.
 \\
 
 \Option{CCALF} &