diff --git a/Modules/_winapi.c b/Modules/_winapi.c
index f341493..bf2498a 100644
--- a/Modules/_winapi.c
+++ b/Modules/_winapi.c
@@ -1722,7 +1722,7 @@ _winapi_WaitForMultipleObjects_impl(PyObject *module, PyObject *handle_seq,
     nhandles = PySequence_Length(handle_seq);
     if (nhandles == -1)
         return NULL;
-    if (nhandles < 0 || nhandles >= MAXIMUM_WAIT_OBJECTS - 1) {
+    if (nhandles < 0 || nhandles > MAXIMUM_WAIT_OBJECTS - 1) {
         PyErr_Format(PyExc_ValueError,
                      "need at most %zd handles, got a sequence of length %zd",
                      MAXIMUM_WAIT_OBJECTS - 1, nhandles);