diff --git a/ccpp/data/GFS_typedefs.F90 b/ccpp/data/GFS_typedefs.F90
index ed29a4104..a6ca113c8 100644
--- a/ccpp/data/GFS_typedefs.F90
+++ b/ccpp/data/GFS_typedefs.F90
@@ -3536,6 +3536,7 @@ subroutine coupling_create (Coupling, IM, Model)
       allocate (Coupling%min_fplume(0))
       allocate (Coupling%max_fplume(0))
       allocate (Coupling%uspdavg(0))
+      allocate (Coupling%rho_dry   (0,0))
       allocate (Coupling%hpbl_thetav(0))
       allocate (Coupling%rrfs_hwp  (0))
       allocate (Coupling%rrfs_hwp_ave  (0))