diff --git a/arch/arm/boot/dts/at91sam9rlek.dts b/arch/arm/boot/dts/at91sam9rlek.dts
index cddb37825fad..b3b89baf972e 100644
--- a/arch/arm/boot/dts/at91sam9rlek.dts
+++ b/arch/arm/boot/dts/at91sam9rlek.dts
@@ -20,6 +20,15 @@ memory {
 		reg = <0x20000000 0x4000000>;
 	};
 
+
+	slow_xtal {
+		clock-frequency = <32768>;
+	};
+
+	main_xtal {
+		clock-frequency = <12000000>;
+	};
+
 	clocks {
 		#address-cells = <1>;
 		#size-cells = <1>;