diff --git a/Modules/_ctypes/_ctypes.c b/Modules/_ctypes/_ctypes.c
index 838dcafdca9..34b6829a9c2 100644
--- a/Modules/_ctypes/_ctypes.c
+++ b/Modules/_ctypes/_ctypes.c
@@ -1769,7 +1769,12 @@ converters_from_argtypes(PyObject *ob)
 	Py_XDECREF(converters);
 	Py_DECREF(ob);
 	PyErr_Format(PyExc_TypeError,
-		     "item %d in _argtypes_ has no from_param method", i+1);
+#if (PY_VERSION_HEX < 0x02050000)
+		     "item %d in _argtypes_ has no from_param method",
+#else
+		     "item %zd in _argtypes_ has no from_param method",
+#endif
+		     i+1);
 	return NULL;
 }
 
@@ -3191,7 +3196,11 @@ _build_callargs(CFuncPtrObject *self, PyObject *argtypes,
 		   message is misleading.  See unittests/test_paramflags.py
 		 */
 		PyErr_Format(PyExc_TypeError,
+#if (PY_VERSION_HEX < 0x02050000)
 			     "call takes exactly %d arguments (%d given)",
+#else
+			     "call takes exactly %d arguments (%zd given)",
+#endif
 			     inargs_index, actual_args);
 		goto error;
 	}
diff --git a/Modules/_ctypes/cfield.c b/Modules/_ctypes/cfield.c
index b5f1b8a2111..ccdab0a8a95 100644
--- a/Modules/_ctypes/cfield.c
+++ b/Modules/_ctypes/cfield.c
@@ -220,21 +220,13 @@ CField_get(CFieldObject *self, PyObject *inst, PyTypeObject *type)
 static PyObject *
 CField_get_offset(PyObject *self, void *data)
 {
-#if (PY_VERSION_HEX < 0x02050000)
-	return PyInt_FromLong(((CFieldObject *)self)->offset);
-#else
 	return PyInt_FromSsize_t(((CFieldObject *)self)->offset);
-#endif
 }
 
 static PyObject *
 CField_get_size(PyObject *self, void *data)
 {
-#if (PY_VERSION_HEX < 0x02050000)
-	return PyInt_FromLong(((CFieldObject *)self)->size);
-#else
 	return PyInt_FromSsize_t(((CFieldObject *)self)->size);
-#endif
 }
 
 static PyGetSetDef CField_getset[] = {
@@ -279,7 +271,7 @@ CField_repr(CFieldObject *self)
 #if (PY_VERSION_HEX < 0x02050000)
 			"<Field type=%s, ofs=%d:%d, bits=%d>",
 #else
-			"<Field type=%s, ofs=%zd:%d, bits=%d>",
+			"<Field type=%s, ofs=%zd:%zd, bits=%zd>",
 #endif
 			name, self->offset, size, bits);
 	else
@@ -287,7 +279,7 @@ CField_repr(CFieldObject *self)
 #if (PY_VERSION_HEX < 0x02050000)
 			"<Field type=%s, ofs=%d, size=%d>",
 #else
-			"<Field type=%s, ofs=%zd, size=%d>",
+			"<Field type=%s, ofs=%zd, size=%zd>",
 #endif
 			name, self->offset, size);
 	return result;
@@ -1263,7 +1255,11 @@ U_set(void *ptr, PyObject *value, Py_ssize_t length)
 	size = PyUnicode_GET_SIZE(value);
 	if (size > length) {
 		PyErr_Format(PyExc_ValueError,
+#if (PY_VERSION_HEX < 0x02050000)
 			     "string too long (%d, maximum length %d)",
+#else
+			     "string too long (%zd, maximum length %zd)",
+#endif
 			     size, length);
 		Py_DECREF(value);
 		return NULL;
@@ -1316,7 +1312,11 @@ s_set(void *ptr, PyObject *value, Py_ssize_t length)
 		++size;
 	} else if (size > length) {
 		PyErr_Format(PyExc_ValueError,
+#if (PY_VERSION_HEX < 0x02050000)
 			     "string too long (%d, maximum length %d)",
+#else
+			     "string too long (%zd, maximum length %zd)",
+#endif
 			     size, length);
 		return NULL;
 	}
diff --git a/Modules/_ctypes/stgdict.c b/Modules/_ctypes/stgdict.c
index 5815fea81e2..b72bf67b33d 100644
--- a/Modules/_ctypes/stgdict.c
+++ b/Modules/_ctypes/stgdict.c
@@ -406,7 +406,11 @@ StructUnionType_update_stgdict(PyObject *type, PyObject *fields, int isStruct)
 		if (dict == NULL) {
 			Py_DECREF(pair);
 			PyErr_Format(PyExc_TypeError,
+#if (PY_VERSION_HEX < 0x02050000)
 				     "second item in _fields_ tuple (index %d) must be a C type",
+#else
+				     "second item in _fields_ tuple (index %zd) must be a C type",
+#endif
 				     i);
 			return -1;
 		}