diff --git a/arch/arm/boot/dts/at91sam9261ek.dts b/arch/arm/boot/dts/at91sam9261ek.dts
index 2ce527e70c7abb45f37e759377f3ee9400f69ee8..c6683ea8b74350b2dace53015b43d1f78b3a7762 100644
--- a/arch/arm/boot/dts/at91sam9261ek.dts
+++ b/arch/arm/boot/dts/at91sam9261ek.dts
@@ -20,6 +20,10 @@
 		reg = <0x20000000 0x4000000>;
 	};
 
+	main_xtal {
+		clock-frequency = <18432000>;
+	};
+
 	clocks {
 		#address-cells = <1>;
 		#size-cells = <1>;