diff --git a/include/mem_pool.h b/include/mem_pool.h
index 4990538..1f94e73 100644
--- a/include/mem_pool.h
+++ b/include/mem_pool.h
@@ -86,6 +86,10 @@ MemPoolError pool_variable_free(VariableMemPool *pool, void *ptr);
 
 MemPoolError pool_variable_destroy(VariableMemPool *pool);
 
+/*
+ * @return same as pool_variable_is_associated
+ * The *aligned* size of the block is written to the size_t pointer
+ */
 MemPoolError pool_variable_aligned_sizeof(VariableMemPool *pool, void *ptr, size_t *size);
 
 /**