diff --git a/target/linux/ath79/dts/ar1022_sitecom_wlr-7100.dts b/target/linux/ath79/dts/ar1022_sitecom_wlr-7100.dts
index 7903f3d73f..da5eba26de 100644
--- a/target/linux/ath79/dts/ar1022_sitecom_wlr-7100.dts
+++ b/target/linux/ath79/dts/ar1022_sitecom_wlr-7100.dts
@@ -128,6 +128,7 @@
 
 				nvmem-layout {
 					compatible = "u-boot,env";
+					env-size = <0x1000>;
 
 					macaddr_uboot_ethaddr: ethaddr {
 						#nvmem-cell-cells = <1>;
diff --git a/target/linux/ath79/dts/qca9558_sitecom_wlr-8100.dts b/target/linux/ath79/dts/qca9558_sitecom_wlr-8100.dts
index 9978a3d7d1..e29076d696 100644
--- a/target/linux/ath79/dts/qca9558_sitecom_wlr-8100.dts
+++ b/target/linux/ath79/dts/qca9558_sitecom_wlr-8100.dts
@@ -83,6 +83,7 @@
 
 				nvmem-layout {
 					compatible = "u-boot,env";
+					env-size = <0x1000>;
 
 					macaddr_uboot_ethaddr: ethaddr {
 						#nvmem-cell-cells = <1>;