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-See [the Directive page](Directive) about how to properly [format a shellcheck directive](Directive#documenting-directive-use).
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+## Invalid key=value pair in directive
+
+### Problematic code:
+
+```sh
+# shellcheck disable=SC2153 (variable not a misspelling)
+```
+
+### Correct code:
+
+```sh
+# shellcheck disable=SC2153 # variable not a misspelling
+```
+
+### Rationale:
+
+A comment at the end of a directive must be preceded by a `#`
+to avoid it being interpreted as an instruction.
+The [directive page](Directive#documenting-directive-use)
+contains more guidance about commenting style.
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