diff --git a/src/autocomplete/UserProvider.tsx b/src/autocomplete/UserProvider.tsx
index 7fc01daef9..eeff1497c2 100644
--- a/src/autocomplete/UserProvider.tsx
+++ b/src/autocomplete/UserProvider.tsx
@@ -56,7 +56,7 @@ export default class UserProvider extends AutocompleteProvider {
         this.matcher = new QueryMatcher([], {
             keys: ['name'],
             funcs: [obj => obj.userId.slice(1)], // index by user id minus the leading '@'
-            shouldMatchPrefix: true,
+            shouldMatchPrefix: false,
             shouldMatchWordsOnly: false,
         });