diff --git a/esphome/components/mdns/mdns_component.h b/esphome/components/mdns/mdns_component.h
index ce4f0e6817..198d1f23ae 100644
--- a/esphome/components/mdns/mdns_component.h
+++ b/esphome/components/mdns/mdns_component.h
@@ -70,7 +70,7 @@ class MDNSComponent : public Component {
 
  protected:
   /// Common setup logic called by all platform-specific setup() implementations
-  void on_setup() {
+  void on_setup_() {
 #ifdef USE_API
     // Populate MAC address buffer once during setup
     get_mac_address_into_buffer(std::span<char, 13>(this->mac_address_));
diff --git a/esphome/components/mdns/mdns_esp32.cpp b/esphome/components/mdns/mdns_esp32.cpp
index b96abb1b3f..1090ef53b5 100644
--- a/esphome/components/mdns/mdns_esp32.cpp
+++ b/esphome/components/mdns/mdns_esp32.cpp
@@ -12,7 +12,7 @@ namespace esphome::mdns {
 static const char *const TAG = "mdns";
 
 void MDNSComponent::setup() {
-  this->on_setup();
+  this->on_setup_();
 
 #ifdef USE_MDNS_STORE_SERVICES
   const auto &services = this->services_;
diff --git a/esphome/components/mdns/mdns_esp8266.cpp b/esphome/components/mdns/mdns_esp8266.cpp
index 3388d1d9ab..14ba355f4a 100644
--- a/esphome/components/mdns/mdns_esp8266.cpp
+++ b/esphome/components/mdns/mdns_esp8266.cpp
@@ -12,7 +12,7 @@
 namespace esphome::mdns {
 
 void MDNSComponent::setup() {
-  this->on_setup();
+  this->on_setup_();
 
 #ifdef USE_MDNS_STORE_SERVICES
   const auto &services = this->services_;
diff --git a/esphome/components/mdns/mdns_host.cpp b/esphome/components/mdns/mdns_host.cpp
index c46e170181..c154b44049 100644
--- a/esphome/components/mdns/mdns_host.cpp
+++ b/esphome/components/mdns/mdns_host.cpp
@@ -9,7 +9,7 @@
 namespace esphome::mdns {
 
 void MDNSComponent::setup() {
-  this->on_setup();
+  this->on_setup_();
   // Host platform doesn't have actual mDNS implementation
 }
 
diff --git a/esphome/components/mdns/mdns_libretiny.cpp b/esphome/components/mdns/mdns_libretiny.cpp
index 945510e051..2ee162ac2e 100644
--- a/esphome/components/mdns/mdns_libretiny.cpp
+++ b/esphome/components/mdns/mdns_libretiny.cpp
@@ -12,7 +12,7 @@
 namespace esphome::mdns {
 
 void MDNSComponent::setup() {
-  this->on_setup();
+  this->on_setup_();
 
 #ifdef USE_MDNS_STORE_SERVICES
   const auto &services = this->services_;
diff --git a/esphome/components/mdns/mdns_rp2040.cpp b/esphome/components/mdns/mdns_rp2040.cpp
index 3b7c2e8254..102e9eb3c2 100644
--- a/esphome/components/mdns/mdns_rp2040.cpp
+++ b/esphome/components/mdns/mdns_rp2040.cpp
@@ -12,7 +12,7 @@
 namespace esphome::mdns {
 
 void MDNSComponent::setup() {
-  this->on_setup();
+  this->on_setup_();
 
 #ifdef USE_MDNS_STORE_SERVICES
   const auto &services = this->services_;