diff --git a/source/extensions/filters/listener/tls_inspector/tls_inspector.h b/source/extensions/filters/listener/tls_inspector/tls_inspector.h
index cea9f63204929..6e038d474b4b4 100644
--- a/source/extensions/filters/listener/tls_inspector/tls_inspector.h
+++ b/source/extensions/filters/listener/tls_inspector/tls_inspector.h
@@ -80,7 +80,7 @@ class Filter : public Network::ListenerFilter, Logger::Loggable<Logger::Id::filt
   // Network::ListenerFilter
   Network::FilterStatus onAccept(Network::ListenerFilterCallbacks& cb) override;
   Network::FilterStatus onData(Network::ListenerFilterBuffer& buffer) override;
-  uint64_t maxReadBytes() const override { return config_->maxClientHelloSize(); }
+  size_t maxReadBytes() const override { return config_->maxClientHelloSize(); }
 
 private:
   ParseState parseClientHello(const void* data, size_t len);