diff --git a/include/grub/arm/linux.h b/include/grub/arm/linux.h
index 2e98a6689..bcd5a7eb1 100644
--- a/include/grub/arm/linux.h
+++ b/include/grub/arm/linux.h
@@ -30,7 +30,7 @@ struct linux_arm_kernel_header {
   grub_uint32_t magic;
   grub_uint32_t start; /* _start */
   grub_uint32_t end;   /* _edata */
-  grub_uint32_t reserved2[4];
+  grub_uint32_t reserved2[3];
   grub_uint32_t hdr_offset;
 };