diff --git a/Modules/_cursesmodule.c b/Modules/_cursesmodule.c
index ead38d3..7c89acc 100644
--- a/Modules/_cursesmodule.c
+++ b/Modules/_cursesmodule.c
@@ -2719,7 +2719,7 @@
             PyErr_Format(PyExc_TypeError,
                          "expect bytes or str of length 1, or int, "
                          "got a str of length %zi",
-                         PyUnicode_GET_SIZE(obj));
+                         PyUnicode_GET_LENGTH(obj));
             return 0;
         }
         *wch = buffer[0];
diff --git a/Modules/_io/stringio.c b/Modules/_io/stringio.c
index a4536b1..83a2465 100644
--- a/Modules/_io/stringio.c
+++ b/Modules/_io/stringio.c
@@ -343,7 +343,7 @@
     if (line == NULL)
         return NULL;
 
-    if (PyUnicode_GET_SIZE(line) == 0) {
+    if (PyUnicode_GET_LENGTH(line) == 0) {
         /* Reached EOF */
         Py_DECREF(line);
         return NULL;
diff --git a/Modules/_json.c b/Modules/_json.c
index e49d1b2..5a79294 100644
--- a/Modules/_json.c
+++ b/Modules/_json.c
@@ -837,7 +837,7 @@
 
     /* rval = parse_constant(constant) */
     rval = PyObject_CallFunctionObjArgs(s->parse_constant, cstr, NULL);
-    idx += PyUnicode_GET_SIZE(cstr);
+    idx += PyUnicode_GET_LENGTH(cstr);
     Py_DECREF(cstr);
     *next_idx_ptr = idx;
     return rval;
diff --git a/Modules/syslogmodule.c b/Modules/syslogmodule.c
index f6dadf4..c7a2487 100644
--- a/Modules/syslogmodule.c
+++ b/Modules/syslogmodule.c
@@ -90,18 +90,16 @@
     if (!PyUnicode_Check(scriptobj)) {
         return(NULL);
     }
-    scriptlen = PyUnicode_GET_SIZE(scriptobj);
+    scriptlen = PyUnicode_GET_LENGTH(scriptobj);
     if (scriptlen == 0) {
         return(NULL);
     }
 
-    slash = PyUnicode_FindChar(scriptobj, SEP,
-                               0, PyUnicode_GET_LENGTH(scriptobj), -1);
+    slash = PyUnicode_FindChar(scriptobj, SEP, 0, scriptlen, -1);
     if (slash == -2)
         return NULL;
     if (slash != -1) {
-        return PyUnicode_Substring(scriptobj, slash,
-                                   PyUnicode_GET_LENGTH(scriptobj));
+        return PyUnicode_Substring(scriptobj, slash, scriptlen);
     } else {
         Py_INCREF(scriptobj);
         return(scriptobj);