1 files changed, 3 insertions, 1 deletions
diff --git a/compat/qhash.hpp b/compat/qhash.hpp
index 7d0f27ba..b92e4e55 100644
--- a/compat/qhash.hpp
+++ b/compat/qhash.hpp
@@ -6,10 +6,12 @@
 
 #if QT_VERSION < QT_VERSION_CHECK(5, 14, 0)
 
+#include <cstdlib>
+
 namespace std {
 template<> struct hash<QString>
 {
-    unsigned operator()(const QString& value) const
+    std::size_t operator()(const QString& value) const noexcept
     {
         return qHash(value);
     }