diff --git a/src/reader/reader.rs b/src/reader/reader.rs
index c3c9a4de3..f9292c33c 100644
--- a/src/reader/reader.rs
+++ b/src/reader/reader.rs
@@ -6808,7 +6808,8 @@ fn handle_completions(&mut self, token_range: Range<usize>, comp: Vec<Completion
 
         // Print the completion list.
         let mut prefix = WString::new();
-        if will_replace_token || !all_matches_exact_or_prefix {
+        assert!(will_replace_token || all_matches_exact_or_prefix);
+        if will_replace_token {
             if use_prefix {
                 prefix.push_utfstr(&common_prefix);
             }