diff --git a/arch/arm/boot/dts/gemini-nas4220b.dts b/arch/arm/boot/dts/gemini-nas4220b.dts
index e1020e07e136..60cec653ac7c 100644
--- a/arch/arm/boot/dts/gemini-nas4220b.dts
+++ b/arch/arm/boot/dts/gemini-nas4220b.dts
@@ -84,7 +84,7 @@
 			partitions {
 				compatible = "redboot-fis";
 				/* Eraseblock at 0xfe0000 */
-				fis-index-block = <0x1fc>;
+				fis-index-block = <0x7f>;
 			};
 		};