diff --git a/src/OpenFOAM/db/Time/Time.C b/src/OpenFOAM/db/Time/Time.C
index 7ba17c7455..49612e8c67 100644
--- a/src/OpenFOAM/db/Time/Time.C
+++ b/src/OpenFOAM/db/Time/Time.C
@@ -25,6 +25,7 @@ License
 
 #include "Time.H"
 #include "timeIOdictionary.H"
+#include "PstreamReduceOps.H"
 #include "argList.H"
 
 // * * * * * * * * * * * * * Static Member Data  * * * * * * * * * * * * * * //
diff --git a/src/OpenFOAM/db/dictionary/functionEntries/codeStream/codeStream.C b/src/OpenFOAM/db/dictionary/functionEntries/codeStream/codeStream.C
index c44fc7322b..eba3259dde 100644
--- a/src/OpenFOAM/db/dictionary/functionEntries/codeStream/codeStream.C
+++ b/src/OpenFOAM/db/dictionary/functionEntries/codeStream/codeStream.C
@@ -28,6 +28,7 @@ License
 #include "dynamicCodeContext.H"
 #include "Time.H"
 #include "OSspecific.H"
+#include "PstreamReduceOps.H"
 #include "addToMemberFunctionSelectionTable.H"
 
 // * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
diff --git a/src/OpenFOAM/db/functionObjects/timeControl/timeControl.H b/src/OpenFOAM/db/functionObjects/timeControl/timeControl.H
index 4cb16d36c8..1fa257a5b9 100644
--- a/src/OpenFOAM/db/functionObjects/timeControl/timeControl.H
+++ b/src/OpenFOAM/db/functionObjects/timeControl/timeControl.H
@@ -2,7 +2,7 @@
   =========                 |
   \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
    \\    /   O peration     | Website:  https://openfoam.org
-    \\  /    A nd           | Copyright (C) 2011-2023 OpenFOAM Foundation
+    \\  /    A nd           | Copyright (C) 2011-2024 OpenFOAM Foundation
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
 License
@@ -37,6 +37,7 @@ SourceFiles
 #define timeControl_H
 
 #include "Time.H"
+#include "scalarList.H"
 
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
diff --git a/src/OpenFOAM/dimensionSet/dimensionSet.H b/src/OpenFOAM/dimensionSet/dimensionSet.H
index 53305e08c5..b4e559276a 100644
--- a/src/OpenFOAM/dimensionSet/dimensionSet.H
+++ b/src/OpenFOAM/dimensionSet/dimensionSet.H
@@ -42,9 +42,7 @@ SourceFiles
 #include "bool.H"
 #include "dimensionedScalarFwd.H"
 #include "className.H"
-#include "scalarField.H"
-#include "PtrList.H"
-#include "HashTable.H"
+#include "List.H"
 
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
diff --git a/src/finiteVolume/cfdTools/general/fvSource/fvSource.H b/src/finiteVolume/cfdTools/general/fvSource/fvSource.H
index 3dd4fdac47..3789bdd9aa 100644
--- a/src/finiteVolume/cfdTools/general/fvSource/fvSource.H
+++ b/src/finiteVolume/cfdTools/general/fvSource/fvSource.H
@@ -2,7 +2,7 @@
   =========                 |
   \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
    \\    /   O peration     | Website:  https://openfoam.org
-    \\  /    A nd           | Copyright (C) 2021-2023 OpenFOAM Foundation
+    \\  /    A nd           | Copyright (C) 2021-2024 OpenFOAM Foundation
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
 License
@@ -36,6 +36,7 @@ SourceFiles
 #define fvSource_H
 
 #include "fvModel.H"
+#include "scalarField.H"
 
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
diff --git a/src/finiteVolume/finiteVolume/ddtSchemes/ddtScheme/ddtScheme.H b/src/finiteVolume/finiteVolume/ddtSchemes/ddtScheme/ddtScheme.H
index c5c8f084da..98b6aa2f7c 100644
--- a/src/finiteVolume/finiteVolume/ddtSchemes/ddtScheme/ddtScheme.H
+++ b/src/finiteVolume/finiteVolume/ddtSchemes/ddtScheme/ddtScheme.H
@@ -2,7 +2,7 @@
   =========                 |
   \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
    \\    /   O peration     | Website:  https://openfoam.org
-    \\  /    A nd           | Copyright (C) 2011-2023 OpenFOAM Foundation
+    \\  /    A nd           | Copyright (C) 2011-2024 OpenFOAM Foundation
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
 License
@@ -37,6 +37,7 @@ SourceFiles
 
 #include "tmp.H"
 #include "dimensionedType.H"
+#include "scalarField.H"
 #include "volFieldsFwd.H"
 #include "surfaceFieldsFwd.H"
 #include "typeInfo.H"
diff --git a/src/functionObjects/utilities/stopAt/stopAt.C b/src/functionObjects/utilities/stopAt/stopAt.C
index c5c4b14ed1..44be233619 100644
--- a/src/functionObjects/utilities/stopAt/stopAt.C
+++ b/src/functionObjects/utilities/stopAt/stopAt.C
@@ -2,7 +2,7 @@
   =========                 |
   \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
    \\    /   O peration     | Website:  https://openfoam.org
-    \\  /    A nd           | Copyright (C) 2020-2023 OpenFOAM Foundation
+    \\  /    A nd           | Copyright (C) 2020-2024 OpenFOAM Foundation
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
 License
@@ -25,6 +25,7 @@ License
 
 #include "stopAt.H"
 #include "Time.H"
+#include "PstreamReduceOps.H"
 #include "addToRunTimeSelectionTable.H"
 
 // * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //