diff --git a/hermit/usr/libgomp/libgomp.h b/hermit/usr/libgomp/libgomp.h
index 76446500d..a6213ec0b 100644
--- a/hermit/usr/libgomp/libgomp.h
+++ b/hermit/usr/libgomp/libgomp.h
@@ -449,7 +449,7 @@ struct gomp_thread
 
   /* User pthread thread pool */
   struct gomp_thread_pool *thread_pool;
-};
+} __attribute__ ((aligned (64)));
 
 
 struct gomp_thread_pool