diff --git a/applications/solvers/coupled/MRFPorousFoam/MRFPorousFoam.C b/applications/solvers/coupled/MRFPorousFoam/MRFPorousFoam.C
index b07c8df11..c7f481fa4 100644
--- a/applications/solvers/coupled/MRFPorousFoam/MRFPorousFoam.C
+++ b/applications/solvers/coupled/MRFPorousFoam/MRFPorousFoam.C
@@ -94,7 +94,7 @@ int main(int argc, char *argv[])
             
             solve
             (
-                tpEqn
+                tpEqn()
              ==
               - fvc::div(U)
             );