diff -up ncl-6.6.2/ncarview/src/lib/libncarg_ras/hdf.c.hdf4.3 ncl-6.6.2/ncarview/src/lib/libncarg_ras/hdf.c
--- ncl-6.6.2/ncarview/src/lib/libncarg_ras/hdf.c.hdf4.3	2019-02-27 16:44:39.000000000 -0700
+++ ncl-6.6.2/ncarview/src/lib/libncarg_ras/hdf.c	2024-03-01 17:37:19.489279369 -0700
@@ -53,7 +53,6 @@
 #include <ncarg/c.h>
 #include <hdf.h>
 #include <df.h>
-#include <dfgr.h>
 #include "ncarg_ras.h"
 #include "hdfP.h"
 #include "options.h"
diff -up ncl-6.6.2/ni/src/ncl/FileSupport.c.hdf4.3 ncl-6.6.2/ni/src/ncl/FileSupport.c
--- ncl-6.6.2/ni/src/ncl/FileSupport.c.hdf4.3	2019-02-27 16:44:39.000000000 -0700
+++ ncl-6.6.2/ni/src/ncl/FileSupport.c	2024-03-01 18:01:16.326558868 -0700
@@ -39,7 +39,6 @@ short    NCLuseAFS;
 #include <netcdf.h>
 
 #ifdef BuildHDF4
-#include <dfi.h>
 #include <mfhdf.h>
 #ifdef BuildHDFEOS
 #include <HdfEosDef.h>