diff --git a/monitoring/histogram_windowing.h b/monitoring/histogram_windowing.h
index 2a6d0dd15..6532aa248 100644
--- a/monitoring/histogram_windowing.h
+++ b/monitoring/histogram_windowing.h
@@ -22,8 +22,8 @@ public:
                          uint64_t micros_per_window,
                          uint64_t min_num_per_window);
 
-  HistogramWindowingImpl(const HistogramImpl&) = delete;
-  HistogramWindowingImpl& operator=(const HistogramImpl&) = delete;
+  HistogramWindowingImpl(const HistogramWindowingImpl&) = delete;
+  HistogramWindowingImpl& operator=(const HistogramWindowingImpl&) = delete;
 
   ~HistogramWindowingImpl();
 
@@ -77,4 +77,4 @@ private:
   uint64_t min_num_per_window_ = 0;
 };
 
-}  // namespace rocksdb
\ No newline at end of file
+}  // namespace rocksdb