diff --git a/src/connection.cpp b/src/connection.cpp
index 9bc43f0..fad710a 100644
--- a/src/connection.cpp
+++ b/src/connection.cpp
@@ -33,8 +33,8 @@ answer_type Connection::get(const endpoint_variant &endpoint,
     {
         if (holds_alternative<API::endpoint_type>(endpoint))
         {
-            return string(_baseuri).append(
-                API{std::get<API::endpoint_type>(endpoint)}.to_string_view());
+            return string(_baseuri)
+                += API{std::get<API::endpoint_type>(endpoint)}.to_string_view();
         }
         return string(std::get<string_view>(endpoint));
     }()};
diff --git a/src/exceptions.cpp b/src/exceptions.cpp
index 7c3da1a..7dd0e0f 100644
--- a/src/exceptions.cpp
+++ b/src/exceptions.cpp
@@ -42,7 +42,7 @@ const char *CURLException::what() const noexcept
         + " - " + _message};
     if (!_error_buffer.empty())
     {
-        error_string.append(" [" + _error_buffer + "]");
+        error_string += " [" + _error_buffer + "]";
     }
     return error_string.c_str();
 }