diff --git a/arch/arm/boot/dts/at91sam9rlek.dts b/arch/arm/boot/dts/at91sam9rlek.dts
index c3cec5d07648..cddb37825fad 100644
--- a/arch/arm/boot/dts/at91sam9rlek.dts
+++ b/arch/arm/boot/dts/at91sam9rlek.dts
@@ -105,6 +105,12 @@ pinctrl_board_mmc0: mmc0-board {
 				};
 			};
 
+			pmc: pmc@fffffc00 {
+				main: mainck {
+					clock-frequency = <12000000>;
+				};
+			};
+
 			watchdog@fffffd40 {
 				status = "okay";
 			};