diff --git a/apps/cpu/RisingBubble2D/RisingBubble2D.cpp b/apps/cpu/RisingBubble2D/RisingBubble2D.cpp
index fd21ce3a3d5e4bf0ff77396d18bb1a44b84f2f1f..32dfe53c35539e08d7f8552353efc6a11d2b2d7f 100644
--- a/apps/cpu/RisingBubble2D/RisingBubble2D.cpp
+++ b/apps/cpu/RisingBubble2D/RisingBubble2D.cpp
@@ -95,7 +95,7 @@ void run(string configname)
         LBMReal D  = 2.0*radius;
 
         //density retio
-        LBMReal r_rho = densityRatio;
+        //LBMReal r_rho = densityRatio;
 
         //density of heavy fluid
         LBMReal rho_h = 1.0;
diff --git a/src/cpu/VirtualFluidsCore/Visitors/SetConnectorsBlockVisitor.h b/src/cpu/VirtualFluidsCore/Visitors/SetConnectorsBlockVisitor.h
index 42ed287c6d9ddfe30e38dce3a05814c385cdefd0..f39a95afc23e5351e0331f789a0e22ae5ff5ccf2 100644
--- a/src/cpu/VirtualFluidsCore/Visitors/SetConnectorsBlockVisitor.h
+++ b/src/cpu/VirtualFluidsCore/Visitors/SetConnectorsBlockVisitor.h
@@ -70,8 +70,7 @@ protected:
     void setSameLevelConnectors(SPtr<Grid3D> grid, SPtr<Block3D> block);
     void setRemoteConnectors(SPtr<Block3D> sblock, SPtr<Block3D> tblock, int dir);
     std::shared_ptr<vf::mpi::Communicator> comm;
-    int dirs;
-    int gridRank;
+    int gridRank{0};
 };
 
 template <class T1, class T2>