diff --git a/src/OpenFOAM/primitives/ints/label/label.C b/src/OpenFOAM/primitives/ints/label/label.C
index 10a621f46..630296381 100644
--- a/src/OpenFOAM/primitives/ints/label/label.C
+++ b/src/OpenFOAM/primitives/ints/label/label.C
@@ -2,7 +2,7 @@
   =========                 |
   \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
    \\    /   O peration     |
-    \\  /    A nd           | Copyright (C) 2011-2015 OpenFOAM Foundation
+    \\  /    A nd           | Copyright (C) 2011-2018 OpenFOAM Foundation
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
 License
@@ -23,7 +23,6 @@ License
 
 \*---------------------------------------------------------------------------*/
 
-#include "error.H"
 #include "label.H"
 
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
@@ -69,7 +68,7 @@ Foam::label Foam::factorial(label n)
     };
 
     #ifdef FULLDEBUG
-    if (n > 12 && n < 0)
+    if (n > 12 || n < 0)
     {
         FatalErrorInFunction
             << "n value out of range"