diff --git a/ESP/lib/src/io/Serial/SerialManager.cpp b/ESP/lib/src/io/Serial/SerialManager.cpp
index b065fd3..b2ec122 100644
--- a/ESP/lib/src/io/Serial/SerialManager.cpp
+++ b/ESP/lib/src/io/Serial/SerialManager.cpp
@@ -52,7 +52,7 @@ void SerialManager::send_frame() {
 #endif
 
 void SerialManager::init() {
-#ifndef SERIAL_MANAGER_USE_HIGHER_FREQUENCY
+#ifdef SERIAL_MANAGER_USE_HIGHER_FREQUENCY
   Serial.begin(3000000);
 #endif
   if (SERIAL_FLUSH_ENABLED) {