diff --git a/Include/modsupport.h b/Include/modsupport.h
index af995f567b004c..c4ced58ac30be0 100644
--- a/Include/modsupport.h
+++ b/Include/modsupport.h
@@ -20,7 +20,7 @@ PyAPI_FUNC(PyObject *) Py_BuildValue(const char *, ...);
 PyAPI_FUNC(PyObject *) Py_VaBuildValue(const char *, va_list);
 
 #if !defined(Py_LIMITED_API) || Py_LIMITED_API+0 >= 0x030a0000
-// Add an attribute with name 'name' and value 'obj' to the module 'mod.
+// Add an attribute with name 'name' and value 'value' to the module 'mod'.
 // On success, return 0.
 // On error, raise an exception and return -1.
 PyAPI_FUNC(int) PyModule_AddObjectRef(PyObject *mod, const char *name, PyObject *value);
diff --git a/Python/getopt.c b/Python/getopt.c
index 39a6938dec7663..55ae1fdf955cc5 100644
--- a/Python/getopt.c
+++ b/Python/getopt.c
@@ -62,7 +62,7 @@ int _PyOS_GetOpt(Py_ssize_t argc, wchar_t * const *argv, int *longindex)
     wchar_t *ptr;
     wchar_t option;
 
-    if (*opt_ptr == '\0') {
+    if (*opt_ptr == L'\0') {
 
         if (_PyOS_optind >= argc)
             return -1;
diff --git a/Python/initconfig.c b/Python/initconfig.c
index 4db77ef47d2362..cc77b2330891be 100644
--- a/Python/initconfig.c
+++ b/Python/initconfig.c
@@ -2685,8 +2685,8 @@ config_parse_cmdline(PyConfig *config, PyWideStringList *warnoptions,
                     return _PyStatus_NO_MEMORY();
                 }
                 memcpy(command, _PyOS_optarg, (len - 2) * sizeof(wchar_t));
-                command[len - 2] = '\n';
-                command[len - 1] = 0;
+                command[len - 2] = L'\n';
+                command[len - 1] = L'\0';
                 config->run_command = command;
             }
             break;