diff --git a/psutil/__init__.py b/psutil/__init__.py
index 169a5e8bd..b94c70ddd 100644
--- a/psutil/__init__.py
+++ b/psutil/__init__.py
@@ -1799,12 +1799,13 @@ def disk_io_counters(perdisk=False):
     rawdict = _psplatform.disk_io_counters()
     if not rawdict:
         raise RuntimeError("couldn't find any physical disk")
+    nt = getattr(_psplatform, 'sdiskio', _common.sdiskio)
     if perdisk:
         for disk, fields in rawdict.items():
-            rawdict[disk] = _common.sdiskio(*fields)
+            rawdict[disk] = nt(*fields)
         return rawdict
     else:
-        return _common.sdiskio(*[sum(x) for x in zip(*rawdict.values())])
+        return nt(*[sum(x) for x in zip(*rawdict.values())])
 
 
 # =====================================================================
diff --git a/psutil/_psbsd.py b/psutil/_psbsd.py
index 4806161bd..0b51cd77e 100644
--- a/psutil/_psbsd.py
+++ b/psutil/_psbsd.py
@@ -103,6 +103,10 @@
     'pmmap_grouped', 'path rss, private, ref_count, shadow_count')
 pmmap_ext = namedtuple(
     'pmmap_ext', 'addr, perms path rss, private, ref_count, shadow_count')
+sdiskio = namedtuple('sdiskio', ['read_count', 'write_count',
+                                 'read_bytes', 'write_bytes',
+                                 'read_time', 'write_time',
+                                 'busy_time'])
 
 # set later from __init__.py
 NoSuchProcess = None
diff --git a/psutil/arch/bsd/freebsd.c b/psutil/arch/bsd/freebsd.c
index 36700092f..f25feba69 100644
--- a/psutil/arch/bsd/freebsd.c
+++ b/psutil/arch/bsd/freebsd.c
@@ -759,13 +759,14 @@ psutil_disk_io_counters(PyObject *self, PyObject *args) {
                  current.unit_number);
 
         py_disk_info = Py_BuildValue(
-            "(KKKKLL)",
+            "(KKKKLLL)",
             current.operations[DEVSTAT_READ],   // no reads
             current.operations[DEVSTAT_WRITE],  // no writes
             current.bytes[DEVSTAT_READ],        // bytes read
             current.bytes[DEVSTAT_WRITE],       // bytes written
             (long long) PSUTIL_BT2MSEC(current.duration[DEVSTAT_READ]),  // r time
-            (long long) PSUTIL_BT2MSEC(current.duration[DEVSTAT_WRITE])  // w time
+            (long long) PSUTIL_BT2MSEC(current.duration[DEVSTAT_WRITE]),  // w time
+            (long long) PSUTIL_BT2MSEC(current.busy_time)  // busy time
         );      // finished transactions
         if (!py_disk_info)
             goto error;