diff --git a/ceilometer_zvm/compute/virt/zvm/inspector.py b/ceilometer_zvm/compute/virt/zvm/inspector.py
index d10755c..ca43450 100644
--- a/ceilometer_zvm/compute/virt/zvm/inspector.py
+++ b/ceilometer_zvm/compute/virt/zvm/inspector.py
@@ -134,7 +134,8 @@ class ZVMInspector(virt_inspector.Inspector):
                                        time=inst_stat['used_cpu_time'])
 
     def inspect_memory_usage(self, instance, duration=None):
-        pass
+        inst_stat = self._get_inst_stat('memory.usage', instance)
+        return virt_inspector.MemoryUsageStats(usage=inst_stat['used_memory'])
 
     def inspect_vnics(self, instance):
         pass
diff --git a/ceilometer_zvm/tests/unit/compute/virt/zvm/test_inspector.py b/ceilometer_zvm/tests/unit/compute/virt/zvm/test_inspector.py
index 03eb002..9e0fe76 100644
--- a/ceilometer_zvm/tests/unit/compute/virt/zvm/test_inspector.py
+++ b/ceilometer_zvm/tests/unit/compute/virt/zvm/test_inspector.py
@@ -155,3 +155,11 @@ class TestZVMInspector(base.BaseTestCase):
         self.assertEqual(2, cpu_stat.number)
         self.assertEqual(99999999, cpu_stat.time)
         get_stat.assert_called_once_with('cpus', None)
+
+    @mock.patch("ceilometer_zvm.compute.virt.zvm.inspector.ZVMInspector."
+                "_get_inst_stat")
+    def test_inspect_memory_usage(self, get_stat):
+        get_stat.return_value = {'used_memory': 1998}
+        mem_usage = self.inspector.inspect_memory_usage(None)
+        self.assertEqual(1998, mem_usage.usage)
+        get_stat.assert_called_once_with('memory.usage', None)