diff --git a/src/math/math_MultipleVarFunction.cdl b/src/math/math_MultipleVarFunction.cdl
index d77983fdaf..cb0d481d38 100644
--- a/src/math/math_MultipleVarFunction.cdl
+++ b/src/math/math_MultipleVarFunction.cdl
@@ -20,6 +20,8 @@ deferred class MultipleVarFunction from math
 uses Vector from math
 
 is
+    Delete(me:out) is virtual;
+    ---C++: alias "Standard_EXPORT virtual ~math_MultipleVarFunction(){Delete();}"
 
     NbVariables(me)
     	---Purpose:
diff --git a/src/math/math_MultipleVarFunction.cxx b/src/math/math_MultipleVarFunction.cxx
index fa5c832313..b1cb1877c3 100644
--- a/src/math/math_MultipleVarFunction.cxx
+++ b/src/math/math_MultipleVarFunction.cxx
@@ -16,3 +16,6 @@
 #include <math_MultipleVarFunction.ixx>
 
 Standard_Integer math_MultipleVarFunction::GetStateNumber() { return 0; }
+
+void math_MultipleVarFunction::Delete()
+{}
diff --git a/src/math/math_MultipleVarFunctionWithGradient.cdl b/src/math/math_MultipleVarFunctionWithGradient.cdl
index c2bbc398c1..8804416238 100644
--- a/src/math/math_MultipleVarFunctionWithGradient.cdl
+++ b/src/math/math_MultipleVarFunctionWithGradient.cdl
@@ -24,7 +24,7 @@ uses Vector from math
 
 is
 
-    Delete(me:out) is virtual;
+    Delete(me:out) is redefined virtual;
     ---C++: alias "Standard_EXPORT virtual ~math_MultipleVarFunctionWithGradient(){Delete();}"
     
     NbVariables(me)
diff --git a/src/math/math_MultipleVarFunctionWithHessian.cdl b/src/math/math_MultipleVarFunctionWithHessian.cdl
index 4f387e5ed0..b20035f2ec 100644
--- a/src/math/math_MultipleVarFunctionWithHessian.cdl
+++ b/src/math/math_MultipleVarFunctionWithHessian.cdl
@@ -24,6 +24,9 @@ uses Matrix from math,
 
 is
 
+    Delete(me:out) is redefined virtual;
+    ---C++: alias "Standard_EXPORT virtual ~math_MultipleVarFunctionWithHessian(){Delete();}"
+
     NbVariables(me)
     	---Purpose: returns the number of variables of the function.
 
diff --git a/src/math/math_MultipleVarFunctionWithHessian.cxx b/src/math/math_MultipleVarFunctionWithHessian.cxx
index 972f474112..2c0044e33a 100644
--- a/src/math/math_MultipleVarFunctionWithHessian.cxx
+++ b/src/math/math_MultipleVarFunctionWithHessian.cxx
@@ -15,3 +15,6 @@
 // commercial license or contractual agreement.
 
 #include <math_MultipleVarFunctionWithHessian.ixx>
+
+void math_MultipleVarFunctionWithHessian::Delete()
+{}