diff --git a/psutil/__init__.py b/psutil/__init__.py
index 006d5f57f..aef3f45ff 100644
--- a/psutil/__init__.py
+++ b/psutil/__init__.py
@@ -911,13 +911,15 @@ def num_threads(self):
         """Return the number of threads used by this process."""
         return self._proc.num_threads()
 
-    def threads(self):
-        """Return threads opened by process as a list of
-        (id, user_time, system_time) namedtuples representing
-        thread id and thread CPU times (user/system).
-        On OpenBSD this method requires root access.
-        """
-        return self._proc.threads()
+    if hasattr(_psplatform.Process, "threads"):
+
+        def threads(self):
+            """Return threads opened by process as a list of
+            (id, user_time, system_time) namedtuples representing
+            thread id and thread CPU times (user/system).
+            On OpenBSD this method requires root access.
+            """
+            return self._proc.threads()
 
     @_assert_pid_not_reused
     def children(self, recursive=False):
diff --git a/psutil/_psaix.py b/psutil/_psaix.py
index 663748bb8..d06dc9c27 100644
--- a/psutil/_psaix.py
+++ b/psutil/_psaix.py
@@ -38,6 +38,8 @@
 # =====================================================================
 
 
+HAS_THREADS = hasattr(cext, "proc_threads")
+
 PAGE_SIZE = os.sysconf('SC_PAGE_SIZE')
 AF_LINK = cext_posix.AF_LINK
 
@@ -427,22 +429,23 @@ def create_time(self):
     def num_threads(self):
         return self._proc_basic_info()[proc_info_map['num_threads']]
 
-    @wrap_exceptions
-    def threads(self):
-        rawlist = cext.proc_threads(self.pid)
-        retlist = []
-        for thread_id, utime, stime in rawlist:
-            ntuple = _common.pthread(thread_id, utime, stime)
-            retlist.append(ntuple)
-        # The underlying C implementation retrieves all OS threads
-        # and filters them by PID.  At this point we can't tell whether
-        # an empty list means there were no connections for process or
-        # process is no longer active so we force NSP in case the PID
-        # is no longer there.
-        if not retlist:
-            # will raise NSP if process is gone
-            os.stat('%s/%s' % (self._procfs_path, self.pid))
-        return retlist
+    if HAS_THREADS:
+        @wrap_exceptions
+        def threads(self):
+            rawlist = cext.proc_threads(self.pid)
+            retlist = []
+            for thread_id, utime, stime in rawlist:
+                ntuple = _common.pthread(thread_id, utime, stime)
+                retlist.append(ntuple)
+            # The underlying C implementation retrieves all OS threads
+            # and filters them by PID.  At this point we can't tell whether
+            # an empty list means there were no connections for process or
+            # process is no longer active so we force NSP in case the PID
+            # is no longer there.
+            if not retlist:
+                # will raise NSP if process is gone
+                os.stat('%s/%s' % (self._procfs_path, self.pid))
+            return retlist
 
     @wrap_exceptions
     def connections(self, kind='inet'):
diff --git a/psutil/_psutil_aix.c b/psutil/_psutil_aix.c
index 52a14feb6..76ed736b2 100644
--- a/psutil/_psutil_aix.c
+++ b/psutil/_psutil_aix.c
@@ -157,6 +157,7 @@ psutil_proc_name_and_args(PyObject *self, PyObject *args) {
 }
 
 
+#ifdef CURR_VERSION_THREAD
 /*
  * Retrieves all threads used by process returning a list of tuples
  * including thread id, user time and system time.
@@ -222,6 +223,7 @@ psutil_proc_threads(PyObject *self, PyObject *args) {
         free(threadt);
     return NULL;
 }
+#endif
 
 
 static PyObject *
@@ -813,8 +815,10 @@ PsutilMethods[] =
      "Return process user and system CPU times."},
     {"proc_cred", psutil_proc_cred, METH_VARARGS,
      "Return process uids/gids."},
+#ifdef CURR_VERSION_THREAD
     {"proc_threads", psutil_proc_threads, METH_VARARGS,
      "Return process threads"},
+#endif
     {"proc_io_counters", psutil_proc_io_counters, METH_VARARGS,
      "Get process I/O counters."},
 
diff --git a/psutil/tests/__init__.py b/psutil/tests/__init__.py
index 86930100e..1d109af0e 100644
--- a/psutil/tests/__init__.py
+++ b/psutil/tests/__init__.py
@@ -160,6 +160,7 @@
 HAS_NUM_CTX_SWITCHES = hasattr(psutil.Process, "num_ctx_switches")
 HAS_PROC_CPU_NUM = hasattr(psutil.Process, "cpu_num")
 HAS_RLIMIT = hasattr(psutil.Process, "rlimit")
+HAS_THREADS = hasattr(psutil.Process, "threads")
 HAS_SENSORS_BATTERY = hasattr(psutil, "sensors_battery")
 HAS_BATTERY = HAS_SENSORS_BATTERY and psutil.sensors_battery()
 HAS_SENSORS_FANS = hasattr(psutil, "sensors_fans")
diff --git a/psutil/tests/test_process.py b/psutil/tests/test_process.py
index fa07f5a92..3eeaa7c3e 100755
--- a/psutil/tests/test_process.py
+++ b/psutil/tests/test_process.py
@@ -49,6 +49,7 @@
 from psutil.tests import HAS_PROC_CPU_NUM
 from psutil.tests import HAS_PROC_IO_COUNTERS
 from psutil.tests import HAS_RLIMIT
+from psutil.tests import HAS_THREADS
 from psutil.tests import mock
 from psutil.tests import PYPY
 from psutil.tests import PYTHON
@@ -528,6 +529,7 @@ def test_num_handles(self):
         p = psutil.Process()
         self.assertGreater(p.num_handles(), 0)
 
+    @unittest.skipIf(not HAS_THREADS, 'not supported')
     def test_threads(self):
         p = psutil.Process()
         if OPENBSD:
@@ -552,6 +554,7 @@ def test_threads(self):
 
     @retry_before_failing()
     @skip_on_access_denied(only_if=OSX)
+    @unittest.skipIf(not HAS_THREADS, 'not supported')
     def test_threads_2(self):
         sproc = get_test_subprocess()
         p = psutil.Process(sproc.pid)