diff --git a/beast/module/core/streams/MemoryOutputStream.h b/beast/module/core/streams/MemoryOutputStream.h
index dea2b940d..2c2b278e3 100644
--- a/beast/module/core/streams/MemoryOutputStream.h
+++ b/beast/module/core/streams/MemoryOutputStream.h
@@ -117,7 +117,7 @@ public:
         capacity off the block, so that its length matches the amount of actual data that
         has been written so far.
     */
-    void flush();
+    void flush() override;
 
     bool write (const void*, size_t) override;
     std::int64_t getPosition() override                                 { return position; }
diff --git a/beast/utility/WrappedSink.h b/beast/utility/WrappedSink.h
index 18a28eeb9..672812b9c 100644
--- a/beast/utility/WrappedSink.h
+++ b/beast/utility/WrappedSink.h
@@ -69,17 +69,17 @@ public:
     }
 
     beast::Journal::Severity
-    severity() const
+    severity() const override
     {
         return sink_.severity();
     }
 
-    void severity (beast::Journal::Severity level)
+    void severity (beast::Journal::Severity level) override
     {
         sink_.severity (level);
     }
 
-    void write (beast::Journal::Severity level, std::string const& text)
+    void write (beast::Journal::Severity level, std::string const& text) override
     {
         using beast::Journal;
         sink_.write (level, prefix_ + text);