diff --git a/debian/libwireshark0.symbols b/debian/libwireshark0.symbols
index 9392832a4b..de8897f2ac 100644
--- a/debian/libwireshark0.symbols
+++ b/debian/libwireshark0.symbols
@@ -167,6 +167,8 @@ libwireshark.so.0 libwireshark0 #MINVER#
  conversation_pt_to_endpoint_type@Base 2.5.0
  conversation_set_dissector@Base 1.9.1
  conversation_set_dissector_from_frame_number@Base 2.0.0
+ conversation_set_port2@Base 2.6.3
+ conversation_set_addr2@Base 2.6.3
  conversation_table_get_num@Base 1.99.0
  conversation_table_iterate_tables@Base 1.99.0
  conversation_table_set_gui_info@Base 1.99.0
@@ -1612,6 +1614,8 @@ libwireshark.so.0 libwireshark0 #MINVER#
  tree_expanded@Base 1.12.0~rc1
  tree_expanded_set@Base 1.12.0~rc1
  try_capture_dissector@Base 2.1.0
+ try_conversation_dissector@Base 2.6.3
+ try_conversation_dissector_by_id@Base 2.6.3
  try_bytesprefix_to_str@Base 2.3.0
  try_bytesval_to_str@Base 2.3.0
  try_enterprises_lookup@Base 2.5.0
diff --git a/epan/conversation.h b/epan/conversation.h
index d345fe19e3..cd8d41612c 100644
--- a/epan/conversation.h
+++ b/epan/conversation.h
@@ -227,19 +227,21 @@ WS_DLL_PUBLIC guint32 conversation_get_endpoint_by_id(struct _packet_info *pinfo
  * Our caller is responsible to call the data dissector explicitly in case
  * this function returns FALSE.
  */
-extern gboolean
+WS_DLL_PUBLIC gboolean
 try_conversation_dissector(const address *addr_a, const address *addr_b, const endpoint_type etype,
     const guint32 port_a, const guint32 port_b, tvbuff_t *tvb, packet_info *pinfo,
     proto_tree *tree, void* data, const guint options);
 
-extern gboolean
+WS_DLL_PUBLIC gboolean
 try_conversation_dissector_by_id(const endpoint_type etype, const guint32 id, tvbuff_t *tvb,
     packet_info *pinfo, proto_tree *tree, void* data);
 
 /* These routines are used to set undefined values for a conversation */
 
-extern void conversation_set_port2(conversation_t *conv, const guint32 port);
-extern void conversation_set_addr2(conversation_t *conv, const address *addr);
+WS_DLL_PUBLIC
+void conversation_set_port2(conversation_t *conv, const guint32 port);
+WS_DLL_PUBLIC
+void conversation_set_addr2(conversation_t *conv, const address *addr);
 
 WS_DLL_PUBLIC
 wmem_map_t *get_conversation_hashtable_exact(void);