diff --git a/src/Draw/TKDraw/Draw/Draw_Interpretor.cxx b/src/Draw/TKDraw/Draw/Draw_Interpretor.cxx
index b27afe7ff4..627f2fc8ac 100644
--- a/src/Draw/TKDraw/Draw/Draw_Interpretor.cxx
+++ b/src/Draw/TKDraw/Draw/Draw_Interpretor.cxx
@@ -424,6 +424,16 @@ Draw_Interpretor& Draw_Interpretor::Append(const int i)
 
 //=================================================================================================
 
+Draw_Interpretor& Draw_Interpretor::Append(const size_t theResult)
+{
+  char c[100];
+  Sprintf(c, "%zu", theResult);
+  Tcl_AppendResult(myInterp, c, (const char*)nullptr);
+  return *this;
+}
+
+//=================================================================================================
+
 Draw_Interpretor& Draw_Interpretor::Append(const double r)
 {
   char s[100];
diff --git a/src/Draw/TKDraw/Draw/Draw_Interpretor.hxx b/src/Draw/TKDraw/Draw/Draw_Interpretor.hxx
index b396f4fbb0..5e1d0fff45 100644
--- a/src/Draw/TKDraw/Draw/Draw_Interpretor.hxx
+++ b/src/Draw/TKDraw/Draw/Draw_Interpretor.hxx
@@ -185,6 +185,11 @@ public:
 
   inline Draw_Interpretor& operator<<(const int theResult) { return Append(theResult); }
 
+  //! Appends to the result
+  Standard_EXPORT Draw_Interpretor& Append(const size_t theResult);
+
+  inline Draw_Interpretor& operator<<(const size_t theResult) { return Append(theResult); }
+
   //! Appends to the result
   Standard_EXPORT Draw_Interpretor& Append(const double theResult);