diff --git a/net/tcp/tcp_monitor.c b/net/tcp/tcp_monitor.c
index e1cb719edc5..95b0c57f0d6 100644
--- a/net/tcp/tcp_monitor.c
+++ b/net/tcp/tcp_monitor.c
@@ -395,6 +395,8 @@ void tcp_close_monitor(FAR struct socket *psock)
         }
     }
 #endif
+
+  net_unlock();
 }
 
 /****************************************************************************