diff --git a/Doc/c-api/unicode.rst b/Doc/c-api/unicode.rst
index cb2438e..343eaf1 100644
--- a/Doc/c-api/unicode.rst
+++ b/Doc/c-api/unicode.rst
@@ -268,57 +268,57 @@
 the Python configuration.
 
 
-.. c:function:: int Py_UNICODE_ISSPACE(Py_UNICODE ch)
+.. c:function:: int Py_UNICODE_ISSPACE(Py_UCS4 ch)
 
    Return ``1`` or ``0`` depending on whether *ch* is a whitespace character.
 
 
-.. c:function:: int Py_UNICODE_ISLOWER(Py_UNICODE ch)
+.. c:function:: int Py_UNICODE_ISLOWER(Py_UCS4 ch)
 
    Return ``1`` or ``0`` depending on whether *ch* is a lowercase character.
 
 
-.. c:function:: int Py_UNICODE_ISUPPER(Py_UNICODE ch)
+.. c:function:: int Py_UNICODE_ISUPPER(Py_UCS4 ch)
 
    Return ``1`` or ``0`` depending on whether *ch* is an uppercase character.
 
 
-.. c:function:: int Py_UNICODE_ISTITLE(Py_UNICODE ch)
+.. c:function:: int Py_UNICODE_ISTITLE(Py_UCS4 ch)
 
    Return ``1`` or ``0`` depending on whether *ch* is a titlecase character.
 
 
-.. c:function:: int Py_UNICODE_ISLINEBREAK(Py_UNICODE ch)
+.. c:function:: int Py_UNICODE_ISLINEBREAK(Py_UCS4 ch)
 
    Return ``1`` or ``0`` depending on whether *ch* is a linebreak character.
 
 
-.. c:function:: int Py_UNICODE_ISDECIMAL(Py_UNICODE ch)
+.. c:function:: int Py_UNICODE_ISDECIMAL(Py_UCS4 ch)
 
    Return ``1`` or ``0`` depending on whether *ch* is a decimal character.
 
 
-.. c:function:: int Py_UNICODE_ISDIGIT(Py_UNICODE ch)
+.. c:function:: int Py_UNICODE_ISDIGIT(Py_UCS4 ch)
 
    Return ``1`` or ``0`` depending on whether *ch* is a digit character.
 
 
-.. c:function:: int Py_UNICODE_ISNUMERIC(Py_UNICODE ch)
+.. c:function:: int Py_UNICODE_ISNUMERIC(Py_UCS4 ch)
 
    Return ``1`` or ``0`` depending on whether *ch* is a numeric character.
 
 
-.. c:function:: int Py_UNICODE_ISALPHA(Py_UNICODE ch)
+.. c:function:: int Py_UNICODE_ISALPHA(Py_UCS4 ch)
 
    Return ``1`` or ``0`` depending on whether *ch* is an alphabetic character.
 
 
-.. c:function:: int Py_UNICODE_ISALNUM(Py_UNICODE ch)
+.. c:function:: int Py_UNICODE_ISALNUM(Py_UCS4 ch)
 
    Return ``1`` or ``0`` depending on whether *ch* is an alphanumeric character.
 
 
-.. c:function:: int Py_UNICODE_ISPRINTABLE(Py_UNICODE ch)
+.. c:function:: int Py_UNICODE_ISPRINTABLE(Py_UCS4 ch)
 
    Return ``1`` or ``0`` depending on whether *ch* is a printable character.
    Nonprintable characters are those characters defined in the Unicode character
@@ -332,7 +332,7 @@
 These APIs can be used for fast direct character conversions:
 
 
-.. c:function:: Py_UNICODE Py_UNICODE_TOLOWER(Py_UNICODE ch)
+.. c:function:: Py_UCS4 Py_UNICODE_TOLOWER(Py_UCS4 ch)
 
    Return the character *ch* converted to lower case.
 
@@ -340,7 +340,7 @@
       This function uses simple case mappings.
 
 
-.. c:function:: Py_UNICODE Py_UNICODE_TOUPPER(Py_UNICODE ch)
+.. c:function:: Py_UCS4 Py_UNICODE_TOUPPER(Py_UCS4 ch)
 
    Return the character *ch* converted to upper case.
 
@@ -348,7 +348,7 @@
       This function uses simple case mappings.
 
 
-.. c:function:: Py_UNICODE Py_UNICODE_TOTITLE(Py_UNICODE ch)
+.. c:function:: Py_UCS4 Py_UNICODE_TOTITLE(Py_UCS4 ch)
 
    Return the character *ch* converted to title case.
 
@@ -356,19 +356,19 @@
       This function uses simple case mappings.
 
 
-.. c:function:: int Py_UNICODE_TODECIMAL(Py_UNICODE ch)
+.. c:function:: int Py_UNICODE_TODECIMAL(Py_UCS4 ch)
 
    Return the character *ch* converted to a decimal positive integer.  Return
    ``-1`` if this is not possible.  This macro does not raise exceptions.
 
 
-.. c:function:: int Py_UNICODE_TODIGIT(Py_UNICODE ch)
+.. c:function:: int Py_UNICODE_TODIGIT(Py_UCS4 ch)
 
    Return the character *ch* converted to a single digit integer. Return ``-1`` if
    this is not possible.  This macro does not raise exceptions.
 
 
-.. c:function:: double Py_UNICODE_TONUMERIC(Py_UNICODE ch)
+.. c:function:: double Py_UNICODE_TONUMERIC(Py_UCS4 ch)
 
    Return the character *ch* converted to a double. Return ``-1.0`` if this is not
    possible.  This macro does not raise exceptions.