diff --git a/book/src/binding/str.md b/book/src/binding/str.md
index 2774754c..7d7d6e8a 100644
--- a/book/src/binding/str.md
+++ b/book/src/binding/str.md
@@ -20,7 +20,6 @@ public:
   Str(const std::string &);
   Str(const char *);
   Str(const char *, size_t);
-  Str(std::string &&) = delete;
 
   Str &operator=(const Str &) noexcept;
 
diff --git a/include/cxx.h b/include/cxx.h
index 24a52928..4ed3302b 100644
--- a/include/cxx.h
+++ b/include/cxx.h
@@ -63,7 +63,6 @@ public:
   Str(const std::string &);
   Str(const char *);
   Str(const char *, size_t);
-  Str(std::string &&) = delete;
 
   Str &operator=(const Str &) noexcept = default;