diff --git a/src/Draw/TKViewerTest/ViewerTest/ViewerTest_ObjectCommands.cxx b/src/Draw/TKViewerTest/ViewerTest/ViewerTest_ObjectCommands.cxx
index 2527087bee..2be98f712a 100644
--- a/src/Draw/TKViewerTest/ViewerTest/ViewerTest_ObjectCommands.cxx
+++ b/src/Draw/TKViewerTest/ViewerTest/ViewerTest_ObjectCommands.cxx
@@ -3212,7 +3212,8 @@ static int VComputeHLR(Draw_Interpretor&, Standard_Integer theArgNb, const char*
     }
   }
 
-  if (aHlrName.IsEmpty() || aSh.IsNull() || (ViewerTest::GetAISContext().IsNull() && hasViewDirArg))
+  if (aHlrName.IsEmpty() || aSh.IsNull()
+      || (ViewerTest::GetAISContext().IsNull() && !hasViewDirArg))
   {
     Message::SendFail("Syntax error: wrong number of arguments");
     return 1;