diff --git a/dlls/rpcrt4/rpc_server.c b/dlls/rpcrt4/rpc_server.c
index 2ab7f5fd3ff..e9ed5931815 100644
--- a/dlls/rpcrt4/rpc_server.c
+++ b/dlls/rpcrt4/rpc_server.c
@@ -117,8 +117,10 @@ static void RPCRT4_push_packet(RpcPacket* packet)
 {
   packet->next = NULL;
   EnterCriticalSection(&spacket_cs);
-  if (spacket_tail) spacket_tail->next = packet;
-  else {
+  if (spacket_tail) {
+    spacket_tail->next = packet;
+    spacket_tail = packet;
+  } else {
     spacket_head = packet;
     spacket_tail = packet;
   }