diff --git a/src/physics/cam/gw_ml.F90 b/src/physics/cam/gw_ml.F90
index c0ba4c2bd9..d9b7623775 100644
--- a/src/physics/cam/gw_ml.F90
+++ b/src/physics/cam/gw_ml.F90
@@ -9,6 +9,7 @@ module gw_ml
 use ppgrid,   only: pver
 use spmd_utils,      only: mpicom, mstrid=>masterprocid, masterproc, mpi_real8
 use cam_abortutils, only: endrun
+use cam_logfile,    only: iulog
 
 use ftorch