diff --git a/gns3server/handlers/api/controller/symbol_handler.py b/gns3server/handlers/api/controller/symbol_handler.py
index cb7139f7..f0c2d9eb 100644
--- a/gns3server/handlers/api/controller/symbol_handler.py
+++ b/gns3server/handlers/api/controller/symbol_handler.py
@@ -22,7 +22,6 @@ import urllib.parse
 
 from gns3server.web.route import Route
 from gns3server.controller import Controller
-from gns3server.utils.picture import get_size
 
 import logging
 log = logging.getLogger(__name__)
@@ -50,16 +49,16 @@ class SymbolHandler:
         status_codes={
             200: "Symbol dimensions returned"
         })
-    async def raw(request, response):
+    async def get_dimensions(request, response):
 
         controller = Controller.instance()
         symbol_id = urllib.parse.unquote(request.match_info["symbol_id"])
         try:
             width, height, _ = controller.symbols.get_size(symbol_id)
-            symbol_dimensions = { 'width': width, 'height': height }
+            symbol_dimensions = {'width': width, 'height': height}
             response.json(symbol_dimensions)
-        except (KeyError, OSError) as e:
-            log.warning("Could not get symbol file: {}".format(e))
+        except (KeyError, OSError, ValueError) as e:
+            log.warning("Could not get symbol dimensions: {}".format(e))
             response.set_status(404)
 
     @Route.get(