diff --git a/Modules/_collectionsmodule.c b/Modules/_collectionsmodule.c
index b26470e..8e51420 100644
--- a/Modules/_collectionsmodule.c
+++ b/Modules/_collectionsmodule.c
@@ -671,7 +671,7 @@
 	}
 	if (((dequeobject *)deque)->maxlen != -1)
 
-		result = PyUnicode_FromFormat("deque(%R, maxlen=%" PY_FORMAT_SIZE_T "d)", 
+		result = PyUnicode_FromFormat("deque(%R, maxlen=%zd)", 
                                               aslist, ((dequeobject *)deque)->maxlen);
 	else
 		result = PyUnicode_FromFormat("deque(%R)", aslist);
diff --git a/Modules/_multiprocessing/connection.h b/Modules/_multiprocessing/connection.h
index e422d69..6e82345 100644
--- a/Modules/_multiprocessing/connection.h
+++ b/Modules/_multiprocessing/connection.h
@@ -47,8 +47,8 @@
 		return NULL;
 
 	if (handle == INVALID_HANDLE_VALUE || (Py_ssize_t)handle < 0) {
-		PyErr_Format(PyExc_IOError, "invalid handle %" 
-			     PY_FORMAT_SIZE_T "d", (Py_ssize_t)handle);
+		PyErr_Format(PyExc_IOError, "invalid handle %zd",
+			     (Py_ssize_t)handle);
 		return NULL;
 	}
 
@@ -404,7 +404,7 @@
 	static char *conn_type[] = {"read-only", "write-only", "read-write"};
 
 	assert(self->flags >= 1 && self->flags <= 3);
-	return FROM_FORMAT("<%s %s, handle %" PY_FORMAT_SIZE_T "d>", 
+	return FROM_FORMAT("<%s %s, handle %zd>", 
 			   conn_type[self->flags - 1],
 			   CONNECTION_NAME, (Py_ssize_t)self->handle);
 }
diff --git a/Modules/_multiprocessing/multiprocessing.h b/Modules/_multiprocessing/multiprocessing.h
index ec5042c..0b32790 100644
--- a/Modules/_multiprocessing/multiprocessing.h
+++ b/Modules/_multiprocessing/multiprocessing.h
@@ -56,7 +56,6 @@
 #  define PY_SSIZE_T_MAX INT_MAX
 #  define PY_SSIZE_T_MIN INT_MIN
 #  define F_PY_SSIZE_T "i"
-#  define PY_FORMAT_SIZE_T ""
 #  define PyInt_FromSsize_t(n) PyInt_FromLong((long)n)
 #else
 #  define F_PY_SSIZE_T "n"
diff --git a/Python/Python-ast.c b/Python/Python-ast.c
index 63dbc43..bf7e4ac 100644
--- a/Python/Python-ast.c
+++ b/Python/Python-ast.c
@@ -412,7 +412,7 @@
     if (PyTuple_GET_SIZE(args) > 0) {
         if (numfields != PyTuple_GET_SIZE(args)) {
             PyErr_Format(PyExc_TypeError, "%.400s constructor takes %s"
-                         "%" PY_FORMAT_SIZE_T "d positional argument%s",
+                         "%zd positional argument%s",
                          Py_TYPE(self)->tp_name,
                          numfields == 0 ? "" : "either 0 or ",
                          numfields, numfields == 1 ? "" : "s");