diff --git a/lib/IotWebConf/src/IotWebConf.cpp b/lib/IotWebConf/src/IotWebConf.cpp
index 8780095..528614d 100644
--- a/lib/IotWebConf/src/IotWebConf.cpp
+++ b/lib/IotWebConf/src/IotWebConf.cpp
@@ -362,7 +362,11 @@ void IotWebConf::setConfigSavedCallback(std::function<void()> func)
   this->_configSavedCallback = func;
 }
 
+#ifndef USE_ESPASYNCWEBSERVER
 void IotWebConf::setFormValidator(std::function<boolean()> func)
+#else
+void IotWebConf::setFormValidator(std::function<boolean(AsyncWebServerRequest *request)> func)
+#endif
 {
   this->_formValidator = func;
 }
@@ -683,7 +687,11 @@ boolean IotWebConf::validateForm(AsyncWebServerRequest* request)
   boolean valid = true;
   if (this->_formValidator != NULL)
   {
+#ifndef USE_ESPASYNCWEBSERVER
     valid = this->_formValidator();
+#else
+    valid = this->_formValidator(request);
+#endif
   }
 
   // -- Internal validation.
diff --git a/lib/IotWebConf/src/IotWebConf.h b/lib/IotWebConf/src/IotWebConf.h
index 424a4d5..679c0a9 100644
--- a/lib/IotWebConf/src/IotWebConf.h
+++ b/lib/IotWebConf/src/IotWebConf.h
@@ -325,8 +325,11 @@ public:
    * If the method will return false, the configuration will not be saved.
    * Should be called before init()!
    */
+#ifndef USE_ESPASYNCWEBSERVER
   void setFormValidator(std::function<boolean()> func);
-
+#else
+  void setFormValidator(std::function<boolean(AsyncWebServerRequest *request)> func);
+#endif
   /**
    * Specify your custom Access Point connection handler. Please use IotWebConf::connectAp() as
    * reference when implementing your custom solution.
@@ -531,7 +534,11 @@ private:
   byte _apConnectionStatus = IOTWEBCONF_AP_CONNECTION_STATE_NC;
   std::function<void()> _wifiConnectionCallback = NULL;
   std::function<void()> _configSavedCallback = NULL;
+#ifndef USE_ESPASYNCWEBSERVER
   std::function<boolean()> _formValidator = NULL;
+#else
+  std::function<boolean(AsyncWebServerRequest* request)> _formValidator = NULL;
+#endif
   std::function<void(const char*, const char*)> _apConnectionHandler =
       &(IotWebConf::connectAp);
   std::function<void(const char*, const char*)> _wifiConnectionHandler =