Dont put "void" in signature for nullary functions.
diff --git a/Doc/c-api/float.rst b/Doc/c-api/float.rst
index f705297..c4099a3 100644
--- a/Doc/c-api/float.rst
+++ b/Doc/c-api/float.rst
@@ -72,21 +72,21 @@
.. versionadded:: 2.6
-.. cfunction:: double PyFloat_GetMax(void)
+.. cfunction:: double PyFloat_GetMax()
Return the maximum representable finite float *DBL_MAX* as C :ctype:`double`.
.. versionadded:: 2.6
-.. cfunction:: double PyFloat_GetMin(void)
+.. cfunction:: double PyFloat_GetMin()
Return the minimum normalized positive float *DBL_MIN* as C :ctype:`double`.
.. versionadded:: 2.6
-.. cfunction:: int PyFloat_ClearFreeList(void)
+.. cfunction:: int PyFloat_ClearFreeList()
Clear the float free list. Return the number of items that could not
be freed.
diff --git a/Doc/c-api/int.rst b/Doc/c-api/int.rst
index 9ff0347..c561bc2 100644
--- a/Doc/c-api/int.rst
+++ b/Doc/c-api/int.rst
@@ -131,7 +131,7 @@
(:const:`LONG_MAX`, as defined in the system header files).
-.. cfunction:: int PyInt_ClearFreeList(void)
+.. cfunction:: int PyInt_ClearFreeList()
Clear the integer free list. Return the number of items that could not
be freed.
diff --git a/Doc/c-api/method.rst b/Doc/c-api/method.rst
index c104f89..add1f0f 100644
--- a/Doc/c-api/method.rst
+++ b/Doc/c-api/method.rst
@@ -65,7 +65,7 @@
Macro version of :cfunc:`PyMethod_Self` which avoids error checking.
-.. cfunction:: int PyMethod_ClearFreeList(void)
+.. cfunction:: int PyMethod_ClearFreeList()
Clear the free list. Return the total number of freed items.
diff --git a/Doc/c-api/sys.rst b/Doc/c-api/sys.rst
index f5d2ab0..6788bc9 100644
--- a/Doc/c-api/sys.rst
+++ b/Doc/c-api/sys.rst
@@ -73,7 +73,7 @@
case *name* is deleted from the sys module. Returns ``0`` on success, ``-1``
on error.
-.. cfunction:: void PySys_ResetWarnOptions(void)
+.. cfunction:: void PySys_ResetWarnOptions()
Reset :data:`sys.warnoptions` to an empty list.
diff --git a/Doc/c-api/tuple.rst b/Doc/c-api/tuple.rst
index 53db2a1..eb479d5 100644
--- a/Doc/c-api/tuple.rst
+++ b/Doc/c-api/tuple.rst
@@ -157,7 +157,7 @@
require changes in your code for properly supporting 64-bit systems.
-.. cfunction:: int PyTuple_ClearFreeList(void)
+.. cfunction:: int PyTuple_ClearFreeList()
Clear the free list. Return the total number of freed items.
diff --git a/Doc/c-api/type.rst b/Doc/c-api/type.rst
index 77a3aec..7d1c773 100644
--- a/Doc/c-api/type.rst
+++ b/Doc/c-api/type.rst
@@ -35,7 +35,7 @@
.. versionadded:: 2.2
-.. cfunction:: unsigned int PyType_ClearCache(void)
+.. cfunction:: unsigned int PyType_ClearCache()
Clear the internal lookup cache. Return the current version tag.
diff --git a/Doc/c-api/unicode.rst b/Doc/c-api/unicode.rst
index 8469ff9..b603734 100644
--- a/Doc/c-api/unicode.rst
+++ b/Doc/c-api/unicode.rst
@@ -98,12 +98,13 @@
:ctype:`PyUnicodeObject` (not checked).
-.. cfunction:: int PyUnicode_ClearFreeList(void)
+.. cfunction:: int PyUnicode_ClearFreeList()
Clear the free list. Return the total number of freed items.
.. versionadded:: 2.6
+
Unicode provides many different character properties. The most often needed ones
are available through these macros which are mapped to C functions depending on
the Python configuration.