diff --git a/netwerk/sctp/datachannel/DataChannel.cpp b/netwerk/sctp/datachannel/DataChannel.cpp
index 285ee502379..d4099ecfec2 100644
--- a/netwerk/sctp/datachannel/DataChannel.cpp
+++ b/netwerk/sctp/datachannel/DataChannel.cpp
@@ -932,7 +932,7 @@ DataChannelConnection::SendOpenRequestMessage(const nsACString& label,
     req->channel_type |= 0x80; // NOTE: be careful if new types are added in the future
   }
 
-  req->reliability_params = htons((uint16_t)prValue); /* XXX Why 16-bit */
+  req->reliability_param = htonl(prValue);
   req->priority = htons(0); /* XXX: add support */
   req->label_length = htons(label_len);
   req->protocol_length = htons(proto_len);
@@ -1092,7 +1092,7 @@ DataChannelConnection::HandleOpenRequestMessage(const struct rtcweb_datachannel_
       /* XXX error handling */
       return;
   }
-  prValue = ntohs(req->reliability_params);
+  prValue = ntohl(req->reliability_param);
   flags = (req->channel_type & 0x80) ? DATA_CHANNEL_FLAGS_OUT_OF_ORDER_ALLOWED : 0;
 
   if ((channel = FindChannelByStream(stream))) {
diff --git a/netwerk/sctp/datachannel/DataChannelProtocol.h b/netwerk/sctp/datachannel/DataChannelProtocol.h
index 41aaea5a48a..6ad9c649499 100644
--- a/netwerk/sctp/datachannel/DataChannelProtocol.h
+++ b/netwerk/sctp/datachannel/DataChannelProtocol.h
@@ -42,8 +42,8 @@
 struct rtcweb_datachannel_open_request {
   uint8_t  msg_type; // DATA_CHANNEL_OPEN
   uint8_t  channel_type;  
-  uint16_t reliability_params;
   int16_t  priority;
+  uint32_t reliability_param;
   uint16_t label_length;
   uint16_t protocol_length;
   char     label[1]; // (and protocol) keep VC++ happy...