diff --git a/src/functionObjects/utilities/writeObjects/writeObjects.C b/src/functionObjects/utilities/writeObjects/writeObjects.C
index 679411f8dd..b2a9ab1381 100644
--- a/src/functionObjects/utilities/writeObjects/writeObjects.C
+++ b/src/functionObjects/utilities/writeObjects/writeObjects.C
@@ -2,7 +2,7 @@
   =========                 |
   \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
    \\    /   O peration     | Website:  https://openfoam.org
-    \\  /    A nd           | Copyright (C) 2011-2018 OpenFOAM Foundation
+    \\  /    A nd           | Copyright (C) 2011-2020 OpenFOAM Foundation
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
 License
@@ -75,7 +75,7 @@ void Foam::functionObjects::writeObjects::writeObject
     {
         case writeOption::AUTO_WRITE:
         {
-            if(obj.writeOpt() != IOobject::AUTO_WRITE)
+            if (obj.writeOpt() != IOobject::AUTO_WRITE)
             {
                 return;
             }
@@ -84,7 +84,7 @@ void Foam::functionObjects::writeObjects::writeObject
         }
         case writeOption::NO_WRITE:
         {
-            if(obj.writeOpt() != IOobject::NO_WRITE)
+            if (obj.writeOpt() != IOobject::NO_WRITE)
             {
                 return;
             }
@@ -115,7 +115,19 @@ void Foam::functionObjects::writeObjects::writeObject
     }
     else
     {
-        writeObjectsBase::writeObject(obj);
+        if (obj.name()[0] == '(')
+        {
+            // If the object is a temporary field expression prepend with "expr"
+            const word name(obj.name());
+            regIOobject& objRef = const_cast<regIOobject&>(obj);
+            objRef.IOobject::rename("expr" + name);
+            writeObjectsBase::writeObject(obj);
+            objRef.IOobject::rename(name);
+        }
+        else
+        {
+            writeObjectsBase::writeObject(obj);
+        }
     }
 }