diff --git a/os/build.rs b/os/build.rs
index 792fe3c4..07a25c99 100644
--- a/os/build.rs
+++ b/os/build.rs
@@ -23,7 +23,7 @@ fn insert_app_data() -> Result<()> {
     apps.sort();
 
     writeln!(f, r#"
-    .align 4
+    .align 3
     .section .data
     .global _num_app
 _num_app:
@@ -40,6 +40,7 @@ _num_app:
     .section .data
     .global app_{0}_start
     .global app_{0}_end
+    .align 3
 app_{0}_start:
     .incbin "{2}{1}"
 app_{0}_end:"#, idx, app, TARGET_PATH)?;