diff --git a/libsrc/visualization/soldata.hpp b/libsrc/visualization/soldata.hpp
index 4c846d62..9778c5ff 100644
--- a/libsrc/visualization/soldata.hpp
+++ b/libsrc/visualization/soldata.hpp
@@ -113,7 +113,7 @@ namespace netgen
       return 1;
     }
 
-    void SetMultiDimComponent (int mc)
+    virtual void SetMultiDimComponent (int mc)
     { 
       if (mc >= GetNumMultiDimComponents()) mc = GetNumMultiDimComponents()-1;
       if (mc < 0) mc = 0;