diff --git a/src/dynamicFvMesh/simplifiedDynamicFvMesh/simplifiedDynamicFvMeshes.C b/src/dynamicFvMesh/simplifiedDynamicFvMesh/simplifiedDynamicFvMeshes.C
index 0c9be71081..adc6219180 100644
--- a/src/dynamicFvMesh/simplifiedDynamicFvMesh/simplifiedDynamicFvMeshes.C
+++ b/src/dynamicFvMesh/simplifiedDynamicFvMesh/simplifiedDynamicFvMeshes.C
@@ -29,7 +29,7 @@ License
 #include "simplifiedDynamicFvMesh.H"
 #include "staticFvMesh.H"
 #include "dynamicMotionSolverFvMesh.H"
-
+#include "motionSolver.H"
 
 namespace Foam
 {