diff --git a/src/activities/network/WifiSelectionActivity.cpp b/src/activities/network/WifiSelectionActivity.cpp
index 66f3e6c6..1c2cab57 100644
--- a/src/activities/network/WifiSelectionActivity.cpp
+++ b/src/activities/network/WifiSelectionActivity.cpp
@@ -37,6 +37,14 @@ void WifiSelectionActivity::onEnter() {
   savePromptSelection = 0;
   forgetPromptSelection = 0;
 
+  // Cache MAC address for display
+  uint8_t mac[6];
+  WiFi.macAddress(mac);
+  char macStr[32];
+  snprintf(macStr, sizeof(macStr), "MAC address: %02x-%02x-%02x-%02x-%02x-%02x",
+           mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
+  cachedMacAddress = std::string(macStr);
+
   // Trigger first update to show scanning message
   updateRequired = true;
 
@@ -445,17 +453,6 @@ std::string WifiSelectionActivity::getSignalStrengthIndicator(const int32_t rssi
   return "    ";  // Very weak
 }
 
-std::string WifiSelectionActivity::getMacAddressString() const {
-  uint8_t mac[6];
-  WiFi.macAddress(mac);
-  
-  char macStr[32];
-  snprintf(macStr, sizeof(macStr), "MAC address: %02X-%02X-%02X-%02X-%02X-%02X",
-           mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
-  
-  return std::string(macStr);
-}
-
 void WifiSelectionActivity::displayTaskLoop() {
   while (true) {
     // If a subactivity is active, yield CPU time but don't render
@@ -584,8 +581,7 @@ void WifiSelectionActivity::renderNetworkList() const {
   }
 
   // Show MAC address above the network count and legend
-  std::string macAddress = getMacAddressString();
-  renderer.drawText(SMALL_FONT_ID, 20, pageHeight - 105, macAddress.c_str());
+  renderer.drawText(SMALL_FONT_ID, 20, pageHeight - 105, cachedMacAddress.c_str());
 
   // Draw help text
   renderer.drawText(SMALL_FONT_ID, 20, pageHeight - 75, "* = Encrypted | + = Saved");
diff --git a/src/activities/network/WifiSelectionActivity.h b/src/activities/network/WifiSelectionActivity.h
index 5b46010d..0a7e7166 100644
--- a/src/activities/network/WifiSelectionActivity.h
+++ b/src/activities/network/WifiSelectionActivity.h
@@ -62,6 +62,9 @@ class WifiSelectionActivity final : public ActivityWithSubactivity {
   // Password to potentially save (from keyboard or saved credentials)
   std::string enteredPassword;
 
+  // Cached MAC address string for display
+  std::string cachedMacAddress;
+
   // Whether network was connected using a saved password (skip save prompt)
   bool usedSavedPassword = false;
 
@@ -90,7 +93,6 @@ class WifiSelectionActivity final : public ActivityWithSubactivity {
   void attemptConnection();
   void checkConnectionStatus();
   std::string getSignalStrengthIndicator(int32_t rssi) const;
-  std::string getMacAddressString() const;
 
  public:
   explicit WifiSelectionActivity(GfxRenderer& renderer, MappedInputManager& mappedInput,