1 files changed, 5 insertions, 0 deletions
diff --git a/compat/qhash.hpp b/compat/qhash.hpp
index b92e4e55..ae7ada6a 100644
--- a/compat/qhash.hpp
+++ b/compat/qhash.hpp
@@ -1,5 +1,7 @@
 #pragma once
 
+#include <functional>
+
 #include <QtGlobal>
 #include <QString>
 #include <QHashFunctions>
@@ -11,6 +13,9 @@
 namespace std {
 template<> struct hash<QString>
 {
+    using argument_type = QString;
+    using result_type = std::size_t;
+
     std::size_t operator()(const QString& value) const noexcept
     {
         return qHash(value);