diff --git a/gns3server/modules/dynamips/dynamips_hypervisor.py b/gns3server/modules/dynamips/dynamips_hypervisor.py
index f4ef1de9..6943c862 100644
--- a/gns3server/modules/dynamips/dynamips_hypervisor.py
+++ b/gns3server/modules/dynamips/dynamips_hypervisor.py
@@ -285,7 +285,7 @@ class DynamipsHypervisor:
                     if not chunk:
                         raise DynamipsError("No data returned from {host}:{port}, Dynamips process running: {run}"
                                             .format(host=self._host, port=self._port, run=self.is_running()))
-                    buf += chunk.decode("utf-8")
+                    buf += chunk.decode("utf-8", errors="ignore")
                 except OSError as e:
                     raise DynamipsError("Lost communication with {host}:{port} :{error}, Dynamips process running: {run}"
                                         .format(host=self._host, port=self._port, error=e, run=self.is_running()))
diff --git a/gns3server/modules/dynamips/nodes/router.py b/gns3server/modules/dynamips/nodes/router.py
index 3af4eedc..598613b8 100644
--- a/gns3server/modules/dynamips/nodes/router.py
+++ b/gns3server/modules/dynamips/nodes/router.py
@@ -373,6 +373,7 @@ class Router(BaseVM):
             files += glob.glob(os.path.join(project_dir, "{}_i{}_slot[0-1]".format(self.platform, self.dynamips_id)))
             files += glob.glob(os.path.join(project_dir, "{}_i{}_nvram".format(self.platform, self.dynamips_id)))
             files += glob.glob(os.path.join(project_dir, "{}_i{}_flash[0-1]".format(self.platform, self.dynamips_id)))
+            files += glob.glob(os.path.join(project_dir, "{}_i{}_rom".format(self.platform, self.dynamips_id)))
             for file in files:
                 try:
                     log.debug("Deleting file {}".format(file))