include <utility> for std::forward

src/Log.hxx

@@ -30,6 +30,7 @@
 
 #include <exception>
 #include <string_view>
+#include <utility>
 
 class Domain;
 

src/lib/expat/ExpatParser.hxx

@@ -25,6 +25,7 @@
 #include <expat.h>
 
 #include <stdexcept>
+#include <utility>
 
 class InputStream;