diff --git a/src/blackmisc/algorithm.h b/src/blackmisc/algorithm.h
index ea6112434..9c5351bad 100644
--- a/src/blackmisc/algorithm.h
+++ b/src/blackmisc/algorithm.h
@@ -28,8 +28,9 @@ namespace BlackMisc
         //! \threadsafe
         inline std::mt19937 &defaultRandomGenerator()
         {
+            //! \fixme Qt 5.10: Use QRandomGenerator.
             static QThreadStorage<std::mt19937> rng;
-            if (rng.hasLocalData()) { rng.setLocalData(std::mt19937(qrand())); }
+            if (rng.hasLocalData()) { rng.setLocalData(std::mt19937(static_cast<std::mt19937::result_type>(qrand()))); }
             return rng.localData();
         }
     }