diff --git a/include/nlohmann/detail/exceptions.hpp b/include/nlohmann/detail/exceptions.hpp
index 56451638de..4d61de4022 100644
--- a/include/nlohmann/detail/exceptions.hpp
+++ b/include/nlohmann/detail/exceptions.hpp
@@ -104,11 +104,12 @@ class exception : public std::exception
             return "";
         }
 
-        return concat('(', std::accumulate(tokens.rbegin(), tokens.rend(), std::string{},
-                                           [](const std::string & a, const std::string & b)
+        auto str = std::accumulate(tokens.rbegin(), tokens.rend(), std::string{},
+                                   [](const std::string & a, const std::string & b)
         {
             return concat(a, '/', detail::escape(b));
-        }), ") ");
+        });
+        return concat('(', str, ") ");
 #else
         static_cast<void>(leaf_element);
         return "";
diff --git a/single_include/nlohmann/json.hpp b/single_include/nlohmann/json.hpp
index f9a7cd3cac..eb4b0a6cbc 100644
--- a/single_include/nlohmann/json.hpp
+++ b/single_include/nlohmann/json.hpp
@@ -3840,11 +3840,12 @@ class exception : public std::exception
             return "";
         }
 
-        return concat('(', std::accumulate(tokens.rbegin(), tokens.rend(), std::string{},
-                                           [](const std::string & a, const std::string & b)
+        auto str = std::accumulate(tokens.rbegin(), tokens.rend(), std::string{},
+                                   [](const std::string & a, const std::string & b)
         {
             return concat(a, '/', detail::escape(b));
-        }), ") ");
+        });
+        return concat('(', str, ") ");
 #else
         static_cast<void>(leaf_element);
         return "";