diff --git a/components/esp_rom/include/esp32/rom/uart.h b/components/esp_rom/include/esp32/rom/uart.h
index 3bd0d38f48..f2fc8c8cbc 100644
--- a/components/esp_rom/include/esp32/rom/uart.h
+++ b/components/esp_rom/include/esp32/rom/uart.h
@@ -10,6 +10,7 @@
 #include "ets_sys.h"
 #include "soc/soc.h"
 #include "soc/uart_periph.h"
+#include "soc/uart_reg.h"
 
 #ifdef __cplusplus
 extern "C" {