diff --git a/mediator/med_diag_mod.F90 b/mediator/med_diag_mod.F90
index 971084835..ef765604e 100644
--- a/mediator/med_diag_mod.F90
+++ b/mediator/med_diag_mod.F90
@@ -426,7 +426,7 @@ end function get_diag_attribute
    end subroutine med_diag_init
 
   !===============================================================================
-  subroutine med_diag_zero_mode(mode, rc )
+  subroutine med_diag_zero_mode(mode, rc)
 
     ! ------------------------------------------------------------------
     ! Zero out global budget diagnostic data.