diff --git a/vcg/space/deprecated_point3.h b/vcg/space/deprecated_point3.h
index 81e67862..2bfac5e9 100644
--- a/vcg/space/deprecated_point3.h
+++ b/vcg/space/deprecated_point3.h
@@ -202,7 +202,8 @@ public:
     template <class EigenVector>
     inline EigenVector ToEigenVector(void) const
     {
-        assert(EigenVector::RowsAtCompileTime == 3 || EigenVector::RowsAtCompileTime == 4);
+		static_assert(EigenVector::RowsAtCompileTime == 3 || EigenVector::RowsAtCompileTime == 4,
+		              "EigenVector type has not 3 or 4 components");
         EigenVector b = EigenVector::Zero();
         b[0]=_v[0];
         b[1]=_v[1];