diff --git a/common/xrdp_constants.h b/common/xrdp_constants.h
index 961020ef..4539c244 100644
--- a/common/xrdp_constants.h
+++ b/common/xrdp_constants.h
@@ -77,6 +77,15 @@
 #define MCS_GLOBAL_CHANNEL             1003
 #define MCS_USERCHANNEL_BASE           1001
 
+/* MCS Connection Type (MS-RDPBCGR 2.2.1.3.2) */
+#define CONNECTION_TYPE_MODEM          0x01
+#define CONNECTION_TYPE_BROADBAND_LOW  0x02
+#define CONNECTION_TYPE_SATELLITE      0x03
+#define CONNECTION_TYPE_BROADBAND_HIGH 0x04
+#define CONNECTION_TYPE_WAN            0x05
+#define CONNECTION_TYPE_LAN            0x06
+#define CONNECTION_TYPE_AUTODETECT     0x07
+
 /* RDP secure transport constants */
 #define SEC_RANDOM_SIZE                32
 #define SEC_MODULUS_SIZE               64
diff --git a/xrdp/xrdp_encoder.c b/xrdp/xrdp_encoder.c
index d5df5085..4d80214e 100644
--- a/xrdp/xrdp_encoder.c
+++ b/xrdp/xrdp_encoder.c
@@ -66,7 +66,7 @@ xrdp_encoder_create(struct xrdp_mm *mm)
 
     client_info = mm->wm->client_info;
 
-    if (client_info->mcs_connection_type != 6) /* LAN */
+    if (client_info->mcs_connection_type != CONNECTION_TYPE_LAN)
     {
         return 0;
     }