diff --git a/ncat/ncat_proxy.c b/ncat/ncat_proxy.c
index c6577e128..93d8b0606 100644
--- a/ncat/ncat_proxy.c
+++ b/ncat/ncat_proxy.c
@@ -307,6 +307,7 @@ static void http_server_handler(int c)
         }
     }
 #endif
+    block_socket(sock.fdn.fd);
 
     code = http_read_request_line(&sock, &buf);
     if (code != 0) {
@@ -386,6 +387,8 @@ static void http_server_handler(int c)
         }
     }
 
+    unblock_socket(sock.fdn.fd);
+
     if (strcmp(request.method, "CONNECT") == 0) {
         code = handle_connect(&sock, &request);
     } else if (strcmp(request.method, "GET") == 0