diff --git a/features/lwipstack/mbed_lib.json b/features/lwipstack/mbed_lib.json
index 7d703640b5c7..2114dc83aacc 100644
--- a/features/lwipstack/mbed_lib.json
+++ b/features/lwipstack/mbed_lib.json
@@ -114,7 +114,7 @@
         },
         "tcpip-thread-stacksize": {
             "help": "Stack size for lwip TCPIP thread",
-            "value": 1200 
+            "value": 1200
         },
         "default-thread-stacksize": {
             "help": "Stack size for lwip system threads",