diff --git a/include/haproxy/trace-t.h b/include/haproxy/trace-t.h
index 2fa63bc84..2d32d99f2 100644
--- a/include/haproxy/trace-t.h
+++ b/include/haproxy/trace-t.h
@@ -192,7 +192,7 @@ struct trace_source {
 	const void *lockon_ptr;  // what to lockon when lockon is set
 	const struct trace_source *follow; // other trace source's tracker to follow
 	int cmdline;             // true if source was activated via -dt command line args
-};
+} THREAD_ALIGNED();
 
 #endif /* _HAPROXY_TRACE_T_H */