diff --git a/include/stdplus/str/buf.hpp b/include/stdplus/str/buf.hpp
index eed6314..7aba316 100644
--- a/include/stdplus/str/buf.hpp
+++ b/include/stdplus/str/buf.hpp
@@ -330,6 +330,11 @@
         return as.store.dyn.ptr + oldlen;
     }
 
+    constexpr void append(const CharT* begin, const CharT* end)
+    {
+        std::copy(begin, end, append(end - begin));
+    }
+
     constexpr void push_back(CharT c) noexcept
     {
         *append(1) = c;