diff --git a/libsrc/general/table.hpp b/libsrc/general/table.hpp
index a62277fa..54f5be31 100644
--- a/libsrc/general/table.hpp
+++ b/libsrc/general/table.hpp
@@ -169,6 +169,7 @@ public:
   /// Inserts element acont into row i. BASE-based. Does not test if already used, assumes to have enough memory
   inline void AddSave (int i, const T & acont)
     {
+      NETGEN_CHECK_RANGE(i, BASE, data.Size()+BASE);
       ((T*)data[i-BASE].col)[data[i-BASE].size] = acont;
       data[i-BASE].size++;
     }