diff --git a/features/FEATURE_LWIP/lwip-interface/lwip_stack.c b/features/FEATURE_LWIP/lwip-interface/lwip_stack.c
index 8175a7c62ac..064612ba6fc 100644
--- a/features/FEATURE_LWIP/lwip-interface/lwip_stack.c
+++ b/features/FEATURE_LWIP/lwip-interface/lwip_stack.c
@@ -790,6 +790,7 @@ static nsapi_error_t mbed_lwip_err_remap(err_t err) {
         case ERR_CLSD:
             return 0;
         case ERR_MEM:
+        case ERR_BUF:
             return NSAPI_ERROR_NO_MEMORY;
         case ERR_CONN:
         case ERR_RST: