diff --git a/target/linux/ath79/dts/ar7240_openmesh_om2p-v1.dts b/target/linux/ath79/dts/ar7240_openmesh_om2p-v1.dts
index 71664094f3..36994222a5 100644
--- a/target/linux/ath79/dts/ar7240_openmesh_om2p-v1.dts
+++ b/target/linux/ath79/dts/ar7240_openmesh_om2p-v1.dts
@@ -145,7 +145,7 @@
 					};
 
 					calibration_art_1000: calibration@1000 {
-						reg = <0x1000 0x440>;
+						reg = <0x1000 0x200>;
 					};
 				};
 			};