diff --git a/esds/helpers/platform.py b/esds/helpers/platform.py
index bafd493..7d16756 100644
--- a/esds/helpers/platform.py
+++ b/esds/helpers/platform.py
@@ -98,11 +98,10 @@ class YAMLPlatformFile:
                 self.parsing_error("Invalid interface type \""+interfaces[i]["type"]+"\"")
             is_wired=interfaces[i]["type"] == "wired"
             links=list()
-            if type(interfaces[i]["links"]) == list:
-                for link in interfaces[i]["links"]:
-                    links.append(self.parse_link(link))
-            else:
-                links.append(self.parse_link(interfaces[i]["links"]))
+            if type(interfaces[i]["links"]) != list:
+                self.parsing_error("Invalide type of links in interface "+i)
+            for link in interfaces[i]["links"]:
+                links.append(self.parse_link(link))
             ##### Create network matrix
             BW=np.full((node_count,node_count),0)
             LAT=np.full((node_count,node_count),0)
diff --git a/example/platform.yaml b/example/platform.yaml
index 0545c04..0f6134e 100644
--- a/example/platform.yaml
+++ b/example/platform.yaml
@@ -18,4 +18,5 @@ interfaces:
             - all 1Bps 10s
     eth0:
         type: "wired"
-        links: all 5Mbps 10s all
\ No newline at end of file
+        links: 
+            - all 5Mbps 10s all
\ No newline at end of file