diff --git a/drivers/st/clk/stm32mp1_clk.c b/drivers/st/clk/stm32mp1_clk.c
index a341cdb..3ebc376 100644
--- a/drivers/st/clk/stm32mp1_clk.c
+++ b/drivers/st/clk/stm32mp1_clk.c
@@ -1094,6 +1094,7 @@
 	case CK_AXI:
 	case CK_MPU:
 	case CK_MCU:
+	case RTC:
 		return true;
 	default:
 		return false;