diff --git a/SC2181.md b/SC2181.md
index 9191825..85de623 100644
--- a/SC2181.md
+++ b/SC2181.md
@@ -35,7 +35,7 @@ To check that a command returns success, use `if mycommand; then ...`.
 
 To check that a command returns failure, use `if ! mycommand; then ...`. Notice that `!` will overwrite `$?` value.
 
-To additionally capture output with command substitution: `if output=$(mycommand); then ...`
+To additionally capture output with command substitution: `if ! output=$(mycommand); then ...`
 
 This also applies to `while`/`until` loops.