diff --git a/gns3server/controller/topology.py b/gns3server/controller/topology.py
index b94dcff5..19835576 100644
--- a/gns3server/controller/topology.py
+++ b/gns3server/controller/topology.py
@@ -406,7 +406,7 @@ def _convert_label(label):
     """
     Convert a label from 1.X to the new format
     """
-    style = qt_font_to_style(label["font"], label["color"])
+    style = qt_font_to_style(label.get("font"), label["color"])
     return {
         "text": label["text"],
         "rotation": 0,
diff --git a/gns3server/utils/qt.py b/gns3server/utils/qt.py
index adb15124..1ec7850d 100644
--- a/gns3server/utils/qt.py
+++ b/gns3server/utils/qt.py
@@ -24,6 +24,8 @@ def qt_font_to_style(font, color):
     """
     Convert a Qt font to CSS style
     """
+    if font is None:
+        font = "TypeWriter,10,-1,5,75,0,0,0,0,0"
     font_info = font.split(",")
     style = "font-family: {};font-size: {};".format(font_info[0], font_info[1])
     if font_info[4] == "75":