diff --git a/exercises/concept/cater-waiter/.docs/introduction.md b/exercises/concept/cater-waiter/.docs/introduction.md
index 235ae86937..dbc95d7197 100644
--- a/exercises/concept/cater-waiter/.docs/introduction.md
+++ b/exercises/concept/cater-waiter/.docs/introduction.md
@@ -114,7 +114,7 @@ TypeError: unhashable type: 'set'
 
 Sets have methods that generally mimic [mathematical set operations][mathematical-sets].
 Most (_not all_) of these methods have an [operator][operator] equivalent.
-Methods generally take any `iterable` as an argument, while operators require that both things being compared are `sets` or `frozensets`.
+Methods generally take any `iterable` as an argument, while operators require that both sides of the operation are `sets` or `frozensets`.
 
 
 ### Disjoint Sets