diff --git a/include/nlohmann/detail/input/json_sax.hpp b/include/nlohmann/detail/input/json_sax.hpp
index 684fac047..1627d2326 100644
--- a/include/nlohmann/detail/input/json_sax.hpp
+++ b/include/nlohmann/detail/input/json_sax.hpp
@@ -222,12 +222,16 @@ class json_sax_dom_parser
 
     bool string(string_t& val)
     {
-        handle_value(val);
+        // json_sax documents that the passed value may be moved from,
+        // so hand the buffer over instead of copying it
+        handle_value(std::move(val));
         return true;
     }
 
     bool binary(binary_t& val)
     {
+        // json_sax documents that the passed value may be moved from,
+        // so hand the buffer over instead of copying it
         handle_value(std::move(val));
         return true;
     }
@@ -532,12 +536,16 @@ class json_sax_dom_callback_parser
 
     bool string(string_t& val)
     {
-        handle_value(val);
+        // json_sax documents that the passed value may be moved from,
+        // so hand the buffer over instead of copying it
+        handle_value(std::move(val));
         return true;
     }
 
     bool binary(binary_t& val)
     {
+        // json_sax documents that the passed value may be moved from,
+        // so hand the buffer over instead of copying it
         handle_value(std::move(val));
         return true;
     }
diff --git a/single_include/nlohmann/json.hpp b/single_include/nlohmann/json.hpp
index 890a7f721..e2c314c5f 100644
--- a/single_include/nlohmann/json.hpp
+++ b/single_include/nlohmann/json.hpp
@@ -10935,12 +10935,16 @@ class json_sax_dom_parser
 
     bool string(string_t& val)
     {
-        handle_value(val);
+        // json_sax documents that the passed value may be moved from,
+        // so hand the buffer over instead of copying it
+        handle_value(std::move(val));
         return true;
     }
 
     bool binary(binary_t& val)
     {
+        // json_sax documents that the passed value may be moved from,
+        // so hand the buffer over instead of copying it
         handle_value(std::move(val));
         return true;
     }
@@ -11245,12 +11249,16 @@ class json_sax_dom_callback_parser
 
     bool string(string_t& val)
     {
-        handle_value(val);
+        // json_sax documents that the passed value may be moved from,
+        // so hand the buffer over instead of copying it
+        handle_value(std::move(val));
         return true;
     }
 
     bool binary(binary_t& val)
     {
+        // json_sax documents that the passed value may be moved from,
+        // so hand the buffer over instead of copying it
         handle_value(std::move(val));
         return true;
     }