diff --git a/docs/rules/require-array-join-separator.md b/docs/rules/require-array-join-separator.md
index d645c0fc26..476640b4b2 100644
--- a/docs/rules/require-array-join-separator.md
+++ b/docs/rules/require-array-join-separator.md
@@ -1,6 +1,6 @@
 # Enforce using the separator argument with `Array#join()`
 
-It's better to make it clear what the separator is when calling [Array#join()](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/join).
+It's better to make it clear what the separator is when calling [Array#join()](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/join), instead of relying on the default comma (`,`) separator. 
 
 This rule is fixable.