diff --git a/apps/gpu/LBM/MusselOyster/MusselOyster.cpp b/apps/gpu/LBM/MusselOyster/MusselOyster.cpp
index 15ac6246f5d3734eb78e35374226988b77eb5ee6..2cbd95222945697be5ffa69b7acb6df3e8740849 100644
--- a/apps/gpu/LBM/MusselOyster/MusselOyster.cpp
+++ b/apps/gpu/LBM/MusselOyster/MusselOyster.cpp
@@ -140,7 +140,7 @@ void multipleLevel(const std::string& configPath)
         ////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
 
         real dx = 1.0;
-        real vx = 0.005;
+        real vx = (real) 0.005;
 
         real Re = 100;