diff --git a/libxrdp/xrdp_sec.c b/libxrdp/xrdp_sec.c
index c44ae420..5b87042a 100644
--- a/libxrdp/xrdp_sec.c
+++ b/libxrdp/xrdp_sec.c
@@ -843,7 +843,7 @@ xrdp_sec_process_mcs_data_channels(struct xrdp_sec *self, struct stream *s)
 
     in_uint32_le(s, num_channels);
 
-    if (num_channels > 256)
+    if (num_channels > 31)
     {
         return 1;
     }