diff --git a/plugins/inputs/procstat/README.md b/plugins/inputs/procstat/README.md
index 8ce834a70..6163b8284 100644
--- a/plugins/inputs/procstat/README.md
+++ b/plugins/inputs/procstat/README.md
@@ -106,6 +106,7 @@ implemented as a WMI query.  The pattern allows fuzzy matching using only
     - memory_rss (int)
     - memory_stack (int)
     - memory_swap (int)
+    - memory_usage (float)
     - memory_vms (int)
     - minor_faults (int)
     - nice_priority (int)