diff --git a/SC2155.md b/SC2155.md
index 4b7d1f6..a81e07c 100644
--- a/SC2155.md
+++ b/SC2155.md
@@ -19,16 +19,18 @@ In the original code, the return value of `mycmd` is ignored, and `export` will
 
 When first marked for export and assigned separately, the return value of the assignment will be that of `mycmd`. This avoids the problem.
 
+Note that ShellCheck does not warn about masking of local read-only variables, such as `local -r foo=$(cmd)`, even though this also masks the return value. This is because the alternative `local foo; foo=$(cmd); local -r foo` is repetitive and cumbersome.
+
 #### Exceptions:
 
-If you intend to ignore the return value of an assignment, you can either ignore this warning or use
+If you intend to ignore the return value of an assignment, you can either [[ignore]] this warning or use
 
 ```sh
 foo=$(mycmd) || true
 export foo
 ```
 
-Shellcheck does not warn about `export foo=bar` because `bar` is a literal and not a command substitution with an independent return value. It also does not warn about `local -r foo=$(cmd)`, where declaration and assignment must be in the same command.
+Shellcheck does not warn about `export foo=bar` because `bar` is a literal and not a command substitution with an independent return value. 
 
 ### Problematic code in the case of `local`: