diff --git a/connectivity/lwipstack/mbed_lib.json b/connectivity/lwipstack/mbed_lib.json
index c94c420153..c8829b6c5c 100644
--- a/connectivity/lwipstack/mbed_lib.json
+++ b/connectivity/lwipstack/mbed_lib.json
@@ -210,6 +210,9 @@
         "MIMXRT1050_EVK": {
             "mem-size": 36560
         },
+        "PORTENTA_H7": {
+            "mem-size": 16000
+        },
         "FVP_MPS2_M3": {
             "mem-size": 36560
         },