diff --git a/Process_Library/Chem_MieTableMod2G.F90 b/Process_Library/Chem_MieTableMod2G.F90
index 2fc9514e..dd86be85 100644
--- a/Process_Library/Chem_MieTableMod2G.F90
+++ b/Process_Library/Chem_MieTableMod2G.F90
@@ -87,7 +87,7 @@ module Chem_MieTableMod2G
      type(Chem_MieTable), pointer :: vtableUse => null()
   end type Chem_Mie
 
-# ifndef HAS_NETCDF3
+#ifndef HAS_NETCDF3
   external nf_open, nf_inq_dimid, nf_inq_dimlen, nf_inq_varid, &
            nf_get_var_double, nf_close
 #endif