diff --git a/nuttx-configs/auav-x21/scripts/ld.script b/nuttx-configs/auav-x21/scripts/ld.script
index dee1f56782..c981791f1f 100644
--- a/nuttx-configs/auav-x21/scripts/ld.script
+++ b/nuttx-configs/auav-x21/scripts/ld.script
@@ -139,6 +139,7 @@ SECTIONS
 		*(.bss .bss.*)
 		*(.gnu.linkonce.b.*)
 		*(COMMON)
+		. = ALIGN(4);
 		_ebss = ABSOLUTE(.);
 	} > sram