diff --git a/src/OpenFOAM/db/IOobject/IOobject.H b/src/OpenFOAM/db/IOobject/IOobject.H
index 7ff2b2a724..d73bade5c0 100644
--- a/src/OpenFOAM/db/IOobject/IOobject.H
+++ b/src/OpenFOAM/db/IOobject/IOobject.H
@@ -307,6 +307,15 @@ public:
             const word& name
         );
 
+        //- Create scope:name1:name2 or scope_name1_name2 string
+        //  An empty scope is ignored.
+        static inline word scopedName
+        (
+            const std::string& scope,
+            const word& name1,
+            const word& name2
+        );
+
         //- Return the IOobject, but also consider an alternative file name.
         //
         //  \param io The expected IOobject to use
@@ -341,7 +350,7 @@ public:
     // Constructors
 
         //- Construct from name, instance, registry, io options
-        //  (default: NO_READ, NO_WRITE, register, non-global)
+        //  (default: NO_READ, NO_WRITE, REGISTER, non-global)
         IOobject
         (
             const word& name,
@@ -351,7 +360,7 @@ public:
         );
 
         //- Construct from name, instance, local, registry, io options
-        //  (default: NO_READ, NO_WRITE, register, non-global)
+        //  (default: NO_READ, NO_WRITE, REGISTER, non-global)
         IOobject
         (
             const word& name,
@@ -362,7 +371,7 @@ public:
         );
 
         //- Construct from path, registry, io options.
-        //  (default: NO_READ, NO_WRITE, register, non-global)
+        //  (default: NO_READ, NO_WRITE, REGISTER, non-global)
         //
         //  Uses fileNameComponents() to split path into components.
         //  A path that starts with a '/' is regarded as a file system path.
diff --git a/src/OpenFOAM/db/IOobject/IOobjectI.H b/src/OpenFOAM/db/IOobject/IOobjectI.H
index eed345e0d2..f0d0c114b6 100644
--- a/src/OpenFOAM/db/IOobject/IOobjectI.H
+++ b/src/OpenFOAM/db/IOobject/IOobjectI.H
@@ -54,7 +54,40 @@ inline Foam::word Foam::IOobject::scopedName
         return name;
     }
 
-    return scope + (IOobject::scopeSeparator + name);
+    word output;
+    output.reserve(scope.size() + name.size() + 1);
+
+    output += scope;
+    output += IOobject::scopeSeparator;
+    output += name;
+    return output;
+}
+
+
+inline Foam::word Foam::IOobject::scopedName
+(
+    const std::string& scope,
+    const word& name1,
+    const word& name2
+)
+{
+    if (scope.empty())
+    {
+        return IOobject::scopedName(name1, name2);
+    }
+
+    word output;
+    output.reserve(scope.size() + name1.size() + name2.size() + 2);
+
+    output += scope;
+    output += IOobject::scopeSeparator;
+    output += name1;
+    if (!name2.empty())
+    {
+        output += IOobject::scopeSeparator;
+        output += name2;
+    }
+    return output;
 }