diff --git a/lib/std/os/linux/tls.zig b/lib/std/os/linux/tls.zig
index f6c339bc2c..d78a14c311 100644
--- a/lib/std/os/linux/tls.zig
+++ b/lib/std/os/linux/tls.zig
@@ -327,7 +327,7 @@ pub fn prepareTLS(area: []u8) usize {
         if (tls_tp_points_past_tcb) tls_image.data_offset else tls_image.tcb_offset;
 }
 
-var main_thread_tls_buffer: [256]u8 = undefined;
+var main_thread_tls_buffer: [256]u8 align(16) = undefined;
 
 pub fn initStaticTLS() void {
     initTLS();