diff --git a/ESPMegaPRO-OS-SDK/lib/ESPMegaPRO/ESPMegaDisplay.cpp b/ESPMegaPRO-OS-SDK/lib/ESPMegaPRO/ESPMegaDisplay.cpp
index f1135cd..5110b9e 100644
--- a/ESPMegaPRO-OS-SDK/lib/ESPMegaPRO/ESPMegaDisplay.cpp
+++ b/ESPMegaPRO-OS-SDK/lib/ESPMegaPRO/ESPMegaDisplay.cpp
@@ -508,6 +508,7 @@ void ESPMegaDisplay::reset()
  */
 ESPMegaDisplay::ESPMegaDisplay(HardwareSerial *displayAdapter)
 {
+    this->serialMutex = xSemaphoreCreateMutex();
     this->displayAdapter = displayAdapter;
     this->currentPage = 0;
     this->rx_buffer_index = 0;