diff --git a/src/collector/filter_collector_wrapper.rs b/src/collector/filter_collector_wrapper.rs
index f1246be9d..b5fc8b6d9 100644
--- a/src/collector/filter_collector_wrapper.rs
+++ b/src/collector/filter_collector_wrapper.rs
@@ -16,7 +16,7 @@ use crate::fastfield::{DynamicFastFieldReader, FastFieldReader, FastValue};
 use crate::schema::Field;
 use crate::{Score, SegmentReader, TantivyError};
 
-/// The `FilterCollector` collector filters docs using a u64 fast field value and a predicate.
+/// The `FilterCollector` collector filters docs using a fast field value and a predicate.
 /// Only the documents for which the predicate returned "true" will be passed on to the next collector.
 ///
 /// ```rust