diff --git a/src/OpenFOAM/matrices/lduMatrix/solvers/GAMG/GAMGAgglomerations/GAMGAgglomeration/GAMGAgglomeration.C b/src/OpenFOAM/matrices/lduMatrix/solvers/GAMG/GAMGAgglomerations/GAMGAgglomeration/GAMGAgglomeration.C
index d41b84ac5b..7dfeea52c6 100644
--- a/src/OpenFOAM/matrices/lduMatrix/solvers/GAMG/GAMGAgglomerations/GAMGAgglomeration/GAMGAgglomeration.C
+++ b/src/OpenFOAM/matrices/lduMatrix/solvers/GAMG/GAMGAgglomerations/GAMGAgglomeration/GAMGAgglomeration.C
@@ -397,7 +397,7 @@ const Foam::GAMGAgglomeration& Foam::GAMGAgglomeration::New
 
     if (agglomPtr)
     {
-        if (agglomPtr->requireUpdate_)
+        if (agglomPtr->requireUpdate_ || agglomPtr->requiresUpdate())
         {
             mesh.thisDb().checkOut(const_cast<GAMGAgglomeration*>(agglomPtr));
             return GAMGAgglomeration::New(matrix, controlDict);
@@ -459,7 +459,7 @@ const Foam::GAMGAgglomeration& Foam::GAMGAgglomeration::New
 
     if (agglomPtr)
     {
-        if (agglomPtr->requireUpdate_)
+        if (agglomPtr->requireUpdate_ || agglomPtr->requiresUpdate())
         {
             mesh.thisDb().checkOut(const_cast<GAMGAgglomeration*>(agglomPtr));
             return GAMGAgglomeration::New(mesh, controlDict);
diff --git a/src/OpenFOAM/matrices/lduMatrix/solvers/GAMG/GAMGAgglomerations/GAMGAgglomeration/GAMGAgglomeration.H b/src/OpenFOAM/matrices/lduMatrix/solvers/GAMG/GAMGAgglomerations/GAMGAgglomeration/GAMGAgglomeration.H
index 3f3e18a118..50d68fb581 100644
--- a/src/OpenFOAM/matrices/lduMatrix/solvers/GAMG/GAMGAgglomerations/GAMGAgglomeration/GAMGAgglomeration.H
+++ b/src/OpenFOAM/matrices/lduMatrix/solvers/GAMG/GAMGAgglomerations/GAMGAgglomeration/GAMGAgglomeration.H
@@ -6,7 +6,7 @@
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
     Copyright (C) 2011-2016 OpenFOAM Foundation
-    Copyright (C) 2019-2023 OpenCFD Ltd.
+    Copyright (C) 2019-2025 OpenCFD Ltd.
 -------------------------------------------------------------------------------
 License
     This file is part of OpenFOAM.
@@ -38,7 +38,9 @@ Description
 
         // Whether to cache the agglomeration
         cacheAgglomeration  yes;
-        // Optionally update every updateInterval mesh motion. Default is 1.
+        // Optionally update every updateInterval time steps. Default is 1.
+        // - only applies if cacheAgglomeration
+        // - applies also for static mesh cases
         updateInterval      10;
         // Optional name (default is GAMGAgglomeration)
         //name            pAgglomeration;
@@ -190,7 +192,7 @@ protected:
     // Protected Member Functions
 
         //- Does the agglomeration need to be fully updated?
-        bool requiresUpdate() const;
+        virtual bool requiresUpdate() const;
 
         //- Assemble coarse mesh addressing
         void agglomerateLduAddressing(const label fineLevelIndex);