diff --git a/common/ms-rdpbcgr.h b/common/ms-rdpbcgr.h
index 3b032e83..813dc4db 100644
--- a/common/ms-rdpbcgr.h
+++ b/common/ms-rdpbcgr.h
@@ -77,6 +77,11 @@
 /* Channel definition structure CHANNEL_DEF (2.2.1.3.4.1) */
 /* This isn't explicitly named in MS-RDPBCGR */
 #define CHANNEL_NAME_LEN                7
+/* These names are also not explicitly defined in MS-RDPBCGR */
+#define CLIPRDR_SVC_CHANNEL_NAME        "cliprdr"
+#define RAIL_SVC_CHANNEL_NAME           "rail"
+#define RDPSND_SVC_CHANNEL_NAME         "rdpsnd"
+#define RDPDR_SVC_CHANNEL_NAME          "rdpdr"
 
 /* 2.2.1.3.6 Client Monitor Data - */
 /* monitorCount (4 bytes): A 32-bit, unsigned integer. The number of display */
diff --git a/sesman/chansrv/chansrv.c b/sesman/chansrv/chansrv.c
index 4452d998..bdfd0c0c 100644
--- a/sesman/chansrv/chansrv.c
+++ b/sesman/chansrv/chansrv.c
@@ -365,23 +365,23 @@ process_message_channel_setup(struct stream *s)
         LOG_DEVEL(LOG_LEVEL_DEBUG, "process_message_channel_setup: chan name '%s' "
                   "id %d flags %8.8x", ci->name, ci->id, ci->flags);
 
-        if (g_strcasecmp(ci->name, "cliprdr") == 0)
+        if (g_strcasecmp(ci->name, CLIPRDR_SVC_CHANNEL_NAME) == 0)
         {
             g_cliprdr_index = g_num_chan_items;
             g_cliprdr_chan_id = ci->id;
         }
-        else if (g_strcasecmp(ci->name, "rdpsnd") == 0)
+        else if (g_strcasecmp(ci->name, RDPSND_SVC_CHANNEL_NAME) == 0)
         {
             g_rdpsnd_index = g_num_chan_items;
             g_rdpsnd_chan_id = ci->id;
         }
-        else if (g_strcasecmp(ci->name, "rdpdr") == 0)
+        else if (g_strcasecmp(ci->name, RDPDR_SVC_CHANNEL_NAME) == 0)
         {
             g_rdpdr_index = g_num_chan_items;
             g_rdpdr_chan_id = ci->id;
         }
         /* disabled for now */
-        else if (g_strcasecmp(ci->name, "rail") == 0)
+        else if (g_strcasecmp(ci->name, RAIL_SVC_CHANNEL_NAME) == 0)
         {
             g_rail_index = g_num_chan_items;
             g_rail_chan_id = ci->id;
diff --git a/vnc/vnc_clip.c b/vnc/vnc_clip.c
index e6bb6ebf..f079dbc6 100644
--- a/vnc/vnc_clip.c
+++ b/vnc/vnc_clip.c
@@ -1047,7 +1047,7 @@ vnc_clip_process_rfb_data(struct vnc *v)
 int
 vnc_clip_open_clip_channel(struct vnc *v)
 {
-    v->clip_chanid = v->server_get_channel_id(v, "cliprdr");
+    v->clip_chanid = v->server_get_channel_id(v, CLIPRDR_SVC_CHANNEL_NAME);
 
     if (v->server_chansrv_in_use(v))
     {