diff --git a/variants/STM32C0xx/C071R(8-B)T/generic_clock.c b/variants/STM32C0xx/C071R(8-B)T/generic_clock.c
index d7679b1c73..62a1564a04 100644
--- a/variants/STM32C0xx/C071R(8-B)T/generic_clock.c
+++ b/variants/STM32C0xx/C071R(8-B)T/generic_clock.c
@@ -12,6 +12,7 @@
  */
 #if defined(ARDUINO_GENERIC_C071R8TX) || defined(ARDUINO_GENERIC_C071RBTX)
 #include "pins_arduino.h"
+#include "stm32yyxx_ll_utils.h"
 
 /**
   * @brief  System Clock Configuration