diff --git a/include/larena.h b/include/larena.h
index d98f1ae..a0b1823 100644
--- a/include/larena.h
+++ b/include/larena.h
@@ -94,9 +94,14 @@ struct LArenaTemp {
  * struct foo *foo = LARENA_ALLOC_TYPE(&my_allocator, struct foo);
  * // Array types can be used too:
  * struct Foo *str = LARENA_ALLOC_TYPE(&my_allocator, struct Foo[32]);
+ * // For arrays with runtime determined size, use:
+ * LARENA_ALLOC_ARRAY(&my_allocator, struct Foo, cnt_foos);
  * @endcode
  */
 #define LARENA_ALLOC_TYPE(allocator, type_) larena_alloc_aligned((allocator), sizeof(type_), _Alignof(type_))
+
+#define LARENA_ALLOC_ARRAY(allocator, type_, nr_elements) larena_alloc_aligned((allocator), nr_elements * sizeof(type_), _Alignof(type_))
+
 // Arena size in bytes
 static inline size_t larena_size(const LArena *arena)
 {