diff --git a/cephclient/wrapper.py b/cephclient/wrapper.py
index aa8a1d0..6609290 100644
--- a/cephclient/wrapper.py
+++ b/cephclient/wrapper.py
@@ -418,6 +418,13 @@ def osd_tree(self, epoch=None, **kwargs):
         else:
             return self.get('osd/tree', **kwargs)
 
+    def osd_df(self, output_method=None, **kwargs):
+        if output_method is not None:
+            return self.get('osd/df?output_method={0}'
+                            .format(output_method), **kwargs)
+        else:
+            return self.get('osd/df', **kwargs)
+
     ###
     # osd PUT calls
     ###