diff --git a/src/finiteVolume/fvMatrices/fvScalarMatrix/fvScalarMatrix.H b/src/finiteVolume/fvMatrices/fvScalarMatrix/fvScalarMatrix.H
index dc0d89db4d..c8f8341788 100644
--- a/src/finiteVolume/fvMatrices/fvScalarMatrix/fvScalarMatrix.H
+++ b/src/finiteVolume/fvMatrices/fvScalarMatrix/fvScalarMatrix.H
@@ -36,6 +36,7 @@ SourceFiles
 #define fvScalarMatrix_H
 
 #include "fvMatrix.H"
+#include "fvMatricesFwd.H"
 
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //