diff --git a/src/Mod/Web/App/AppWeb.cpp b/src/Mod/Web/App/AppWeb.cpp
index d89e3ef568..54b2a9ebbc 100644
--- a/src/Mod/Web/App/AppWeb.cpp
+++ b/src/Mod/Web/App/AppWeb.cpp
@@ -89,7 +89,7 @@ private:
         if (!PyArg_ParseTuple(args.ptr(), "|si", &addr, &port)) {
             throw Py::Exception();
         }
-        if (port > USHRT_MAX) {
+        if (port > std::numeric_limits<unsigned short>::max()) {
             throw Py::OverflowError("port number is greater than maximum");
         }
         else if (port < 0) {
@@ -121,7 +121,7 @@ private:
         if (!PyArg_ParseTuple(args.ptr(), "|sii", &addr, &port, &timeout)) {
             throw Py::Exception();
         }
-        if (port > USHRT_MAX) {
+        if (port > std::numeric_limits<unsigned short>::max()) {
             throw Py::OverflowError("port number is greater than maximum");
         }
         else if (port < 0) {