diff --git a/Objects/stringlib/ucs1lib.h b/Objects/stringlib/ucs1lib.h
index 4685c17..c0f7adf 100644
--- a/Objects/stringlib/ucs1lib.h
+++ b/Objects/stringlib/ucs1lib.h
@@ -19,7 +19,7 @@
 #define STRINGLIB_FILL           Py_UNICODE_FILL
 #define STRINGLIB_STR            PyUnicode_1BYTE_DATA
 #define STRINGLIB_LEN            PyUnicode_GET_LENGTH
-#define STRINGLIB_NEW            PyUnicode_FromUCS1
+#define STRINGLIB_NEW            _PyUnicode_FromUCS1
 #define STRINGLIB_RESIZE         not_supported
 #define STRINGLIB_CHECK          PyUnicode_Check
 #define STRINGLIB_CHECK_EXACT    PyUnicode_CheckExact
diff --git a/Objects/stringlib/ucs2lib.h b/Objects/stringlib/ucs2lib.h
index 1bb9c27..fc62fb7 100644
--- a/Objects/stringlib/ucs2lib.h
+++ b/Objects/stringlib/ucs2lib.h
@@ -19,7 +19,7 @@
 #define STRINGLIB_FILL           Py_UNICODE_FILL
 #define STRINGLIB_STR            PyUnicode_1BYTE_DATA
 #define STRINGLIB_LEN            PyUnicode_GET_LENGTH
-#define STRINGLIB_NEW            PyUnicode_FromUCS2
+#define STRINGLIB_NEW            _PyUnicode_FromUCS2
 #define STRINGLIB_RESIZE         not_supported
 #define STRINGLIB_CHECK          PyUnicode_Check
 #define STRINGLIB_CHECK_EXACT    PyUnicode_CheckExact
diff --git a/Objects/stringlib/ucs4lib.h b/Objects/stringlib/ucs4lib.h
index 776d65f..be1206a 100644
--- a/Objects/stringlib/ucs4lib.h
+++ b/Objects/stringlib/ucs4lib.h
@@ -19,7 +19,7 @@
 #define STRINGLIB_FILL           Py_UNICODE_FILL
 #define STRINGLIB_STR            PyUnicode_1BYTE_DATA
 #define STRINGLIB_LEN            PyUnicode_GET_LENGTH
-#define STRINGLIB_NEW            PyUnicode_FromUCS4
+#define STRINGLIB_NEW            _PyUnicode_FromUCS4
 #define STRINGLIB_RESIZE         not_supported
 #define STRINGLIB_CHECK          PyUnicode_Check
 #define STRINGLIB_CHECK_EXACT    PyUnicode_CheckExact
diff --git a/Objects/unicodeobject.c b/Objects/unicodeobject.c
index b53c210..68977f4 100644
--- a/Objects/unicodeobject.c
+++ b/Objects/unicodeobject.c
@@ -1117,8 +1117,8 @@
     return PyUnicode_FromStringAndSize(u, size);
 }
 
-PyObject*
-PyUnicode_FromUCS1(const unsigned char* u, Py_ssize_t size)
+static PyObject*
+_PyUnicode_FromUCS1(const unsigned char* u, Py_ssize_t size)
 {
     PyObject *res;
     unsigned char max = 127;
@@ -1136,8 +1136,8 @@
     return res;
 }
 
-PyObject*
-PyUnicode_FromUCS2(const Py_UCS2 *u, Py_ssize_t size)
+static PyObject*
+_PyUnicode_FromUCS2(const Py_UCS2 *u, Py_ssize_t size)
 {
     PyObject *res;
     Py_UCS2 max = 0;
@@ -1156,8 +1156,8 @@
     return res;
 }
 
-PyObject*
-PyUnicode_FromUCS4(const Py_UCS4 *u, Py_ssize_t size)
+static PyObject*
+_PyUnicode_FromUCS4(const Py_UCS4 *u, Py_ssize_t size)
 {
     PyObject *res;
     Py_UCS4 max = 0;
@@ -1184,11 +1184,11 @@
 {
     switch(kind) {
     case PyUnicode_1BYTE_KIND:
-        return PyUnicode_FromUCS1(buffer, size);
+        return _PyUnicode_FromUCS1(buffer, size);
     case PyUnicode_2BYTE_KIND:
-        return PyUnicode_FromUCS2(buffer, size);
+        return _PyUnicode_FromUCS2(buffer, size);
     case PyUnicode_4BYTE_KIND:
-        return PyUnicode_FromUCS4(buffer, size);
+        return _PyUnicode_FromUCS4(buffer, size);
     }
     assert(0);
     return NULL;
@@ -5645,7 +5645,7 @@
 		       const char *errors)
 {
     /* Latin-1 is equivalent to the first 256 ordinals in Unicode. */
-    return PyUnicode_FromUCS1((unsigned char*)s, size);
+    return _PyUnicode_FromUCS1((unsigned char*)s, size);
 }
 
 /* create or adjust a UnicodeEncodeError */