diff --git a/epan/dfilter/dfilter.c b/epan/dfilter/dfilter.c
index d656d4f00b..fae8bdd423 100644
--- a/epan/dfilter/dfilter.c
+++ b/epan/dfilter/dfilter.c
@@ -1,5 +1,5 @@
 /*
- * $Id: dfilter.c,v 1.11 2002/08/28 20:40:55 jmayer Exp $
+ * $Id: dfilter.c,v 1.12 2002/09/09 21:04:15 guy Exp $
  *
  * Ethereal - Network traffic analyzer
  * By Gerald Combs <gerald@ethereal.com>
@@ -297,7 +297,7 @@ dfilter_apply_edt(dfilter_t *df, epan_dissect_t* edt)
 
 
 void
-dfilter_prime_proto_tree(dfilter_t *df, proto_tree *tree)
+dfilter_prime_proto_tree(const dfilter_t *df, proto_tree *tree)
 {
     int i;
 
diff --git a/epan/dfilter/dfilter.h b/epan/dfilter/dfilter.h
index 48c5f5c15f..4128215ea8 100644
--- a/epan/dfilter/dfilter.h
+++ b/epan/dfilter/dfilter.h
@@ -1,5 +1,5 @@
 /*
- * $Id: dfilter.h,v 1.6 2002/08/28 20:40:55 jmayer Exp $
+ * $Id: dfilter.h,v 1.7 2002/09/09 21:04:15 guy Exp $
  *
  * Ethereal - Network traffic analyzer
  * By Gerald Combs <gerald@ethereal.com>
@@ -78,7 +78,7 @@ dfilter_apply(dfilter_t *df, proto_tree *tree);
 
 /* Prime a proto_tree using the fields/protocols used in a dfilter. */
 void
-dfilter_prime_proto_tree(dfilter_t *df, proto_tree *tree);
+dfilter_prime_proto_tree(const dfilter_t *df, proto_tree *tree);
 
 /* Print bytecode of dfilter to stdout */
 void
diff --git a/epan/epan.c b/epan/epan.c
index 91e0ed944f..dece9175b6 100644
--- a/epan/epan.c
+++ b/epan/epan.c
@@ -1,9 +1,8 @@
 /* epan.h
  *
- * $Id: epan.c,v 1.20 2002/09/04 09:40:29 sahlberg Exp $
+ * $Id: epan.c,v 1.21 2002/09/09 21:04:06 guy Exp $
  *
  * Ethereal Protocol Analyzer Library
- *
  */
 
 #ifdef HAVE_CONFIG_H
@@ -120,7 +119,7 @@ epan_dissect_free(epan_dissect_t* edt)
 }
 
 void
-epan_dissect_prime_dfilter(epan_dissect_t *edt, dfilter_t* dfcode)
+epan_dissect_prime_dfilter(epan_dissect_t *edt, const dfilter_t* dfcode)
 {
 	dfilter_prime_proto_tree(dfcode, edt->tree);
 }
diff --git a/epan/epan.h b/epan/epan.h
index 5e6a23788b..24b02a79a7 100644
--- a/epan/epan.h
+++ b/epan/epan.h
@@ -1,6 +1,6 @@
 /* epan.h
  *
- * $Id: epan.h,v 1.13 2002/08/28 20:40:44 jmayer Exp $
+ * $Id: epan.h,v 1.14 2002/09/09 21:04:06 guy Exp $
  *
  * Ethereal Protocol Analyzer Library
  *
@@ -19,7 +19,6 @@
  * You should have received a copy of the GNU General Public License
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
- *
  */
 
 #ifndef EPAN_H
@@ -64,7 +63,7 @@ epan_dissect_run(epan_dissect_t *edt, void* pseudo_header,
         const guint8* data, frame_data *fd, column_info *cinfo);
 
 void
-epan_dissect_prime_dfilter(epan_dissect_t *edt, dfilter_t*);
+epan_dissect_prime_dfilter(epan_dissect_t *edt, const dfilter_t*);
 
 void
 epan_dissect_fill_in_columns(epan_dissect_t *edt);