diff --git a/sapi/include/rsi_hal.h b/sapi/include/rsi_hal.h
index 0c3f4594..ddd77cf3 100644
--- a/sapi/include/rsi_hal.h
+++ b/sapi/include/rsi_hal.h
@@ -136,7 +136,7 @@ uint32_t GetTickCount(void);
 
 void rsi_interrupt_handler(void);
 void ABRD(void);
-short int rsi_uart_iface_int();
+short int rsi_uart_iface_int(void);
 
 void Error_Handler(void);
 
diff --git a/sapi/include/rsi_uart.h b/sapi/include/rsi_uart.h
index af53aa49..2b13b836 100644
--- a/sapi/include/rsi_uart.h
+++ b/sapi/include/rsi_uart.h
@@ -153,7 +153,7 @@ extern void rsi_enter_critical_sec(void);
 extern void rsi_exit_critical_sec(void);
 extern void rsi_platform_based_init(void);
 extern int32_t rsi_uart_deinit(void);
-extern short int rsi_uart_iface_int();
+extern short int rsi_uart_iface_int(void);
 extern void uart_init(void);
 #endif