diff --git a/Objects/rangeobject.c b/Objects/rangeobject.c
index 7da6162744ffd6..45d91143aee9f1 100644
--- a/Objects/rangeobject.c
+++ b/Objects/rangeobject.c
@@ -3,6 +3,7 @@
 #include "Python.h"
 #include "pycore_abstract.h"      // _PyIndex_Check()
 #include "pycore_ceval.h"         // _PyEval_GetBuiltin()
+#include "pycore_critical_section.h" // Py_BEGIN_CRITICAL_SECTION()
 #include "pycore_long.h"          // _PyLong_GetZero()
 #include "pycore_modsupport.h"    // _PyArg_NoKwnames()
 #include "pycore_range.h"
@@ -813,16 +814,20 @@ PyTypeObject PyRange_Type = {
    in the normal case, but possible for any numeric value.
 */
 
+
 static PyObject *
 rangeiter_next(_PyRangeIterObject *r)
 {
+    PyObject *ret = NULL;
+    Py_BEGIN_CRITICAL_SECTION(r);
     if (r->len > 0) {
         long result = r->start;
         r->start = result + r->step;
         r->len--;
-        return PyLong_FromLong(result);
+        ret = PyLong_FromLong(result);
     }
-    return NULL;
+    Py_END_CRITICAL_SECTION();
+    return ret;
 }
 
 static PyObject *