diff --git a/src/functionObjects/forces/forceCoeffs/forceCoeffs.H b/src/functionObjects/forces/forceCoeffs/forceCoeffs.H
index a676df851f..db6e5f716f 100644
--- a/src/functionObjects/forces/forceCoeffs/forceCoeffs.H
+++ b/src/functionObjects/forces/forceCoeffs/forceCoeffs.H
@@ -96,6 +96,7 @@ Usage
         writeFields  | Write force,moment coefficient fields | no | no
         patches      | Patches included in the forces calculation | yes |
         magUInf      | Free stream velocity magnitude       | yes |
+        rhoInf       | Free stream density | for compressible cases |
         lRef         | Reference length scale for moment calculations | yes |
         Aref         | Reference area                       | yes |
         porosity     | Include porosity contributions       | no  | false
diff --git a/src/functionObjects/initialisation/hydrostaticPressure/hydrostaticPressure.H b/src/functionObjects/initialisation/hydrostaticPressure/hydrostaticPressure.H
index ce280223e7..433ad80eee 100644
--- a/src/functionObjects/initialisation/hydrostaticPressure/hydrostaticPressure.H
+++ b/src/functionObjects/initialisation/hydrostaticPressure/hydrostaticPressure.H
@@ -48,7 +48,7 @@ Usage
         p_rgh        | Name of p_rgh field     | no          | p_rgh
         ph_rgh       | Name of ph_rgh field    | no          | ph_rgh
         pRef         | Name of pressure ref field | no       | pRef
-        pRefValue    | Value of pressure ref when pRef set to pInf | no | 0
+        pRefValue    | Value of pressure ref | when pRef set to pInf | 0
         rho          | Name of density field   | no          | rho
         U            | Name of velocity field  | no          | U
         gh           | Name of gravity*height volume field  | no | gh