Index: uspace/lib/cpp/include/__bits/string/string.hpp
===================================================================
--- uspace/lib/cpp/include/__bits/string/string.hpp	(revision 1dafe18b42ddb520b63d78865ffb24c38c5115ea)
+++ uspace/lib/cpp/include/__bits/string/string.hpp	(revision 1502c055a8eeb72861c4fa35a13e69ffe8586b7a)
@@ -521,5 +521,5 @@
 
             basic_string(size_type n, value_type c, const allocator_type& alloc = allocator_type{})
-                : data_{}, size_{n}, capacity_{n}, allocator_{alloc}
+                : data_{}, size_{n}, capacity_{n + 1}, allocator_{alloc}
             {
                 data_ = allocator_.allocate(capacity_);
@@ -908,5 +908,5 @@
             {
                 // TODO: if (n > max_size()) throw length_error.
-                resize_without_copy_(n);
+                resize_without_copy_(n + 1);
                 traits_type::copy(begin(), str, n);
                 size_ = n;