diff --git a/alignment/alignment.c b/alignment/alignment.c
index 72a063c..e9332e5 100644
--- a/alignment/alignment.c
+++ b/alignment/alignment.c
@@ -3,7 +3,8 @@
 size_t align(size_t size)
 {
     size_t res;
-    if (__builtin_add_overflow(size, 8 - (size % 8), &res))
+    if (__builtin_add_overflow(
+            size, sizeof(long double) - (size % sizeof(long double)), &res))
         return 0;
 
     return res;