diff --git a/SC2126.md b/SC2126.md
index 6c89ec5..d435afb 100644
--- a/SC2126.md
+++ b/SC2126.md
@@ -25,6 +25,8 @@ then
 fi
 ```
 
+Also note that in `foo | grep bar | wc -l`, wc will mask the exit code of grep by default (i.e. without `set -o pipefail`), and always return success. If replacing with `foo | grep -c bar`, grep will exit non-zero when the count is 0. This is convenient for conditional statements but may require handling when used with `set -e`.
+
 ### Exceptions
 
-If you e.g. want to count characters instead of lines, and you actually care about the number and not just whether it's greater than 0.
+If you e.g. want to count characters instead of lines, and you actually care about the number and not just whether it's greater than 0, you can [[ignore]] this error.