diff --git a/connectivity/libraries/ppp/source/ppp_service.cpp b/connectivity/libraries/ppp/source/ppp_service.cpp
index 374bf52e89..17ceff37aa 100644
--- a/connectivity/libraries/ppp/source/ppp_service.cpp
+++ b/connectivity/libraries/ppp/source/ppp_service.cpp
@@ -358,7 +358,7 @@ nsapi_error_t ppp_service::ppp_if_disconnect()
         ret = ppp_close(ppp_service_pcb, 0);
         if (ret == ERR_OK) {
             /* close call made, now let's catch the response in the status callback */
-            ppp_service_close_sem.try_acquire_for(PPP_TERMINATION_TIMEOUT);
+            ppp_service_close_sem.try_acquire_for(std::chrono::milliseconds(PPP_TERMINATION_TIMEOUT));
         }
         ppp_service_active = false;
     }