diff --git a/plugins/inputs/diskio/README.md b/plugins/inputs/diskio/README.md
index ce2acda55..11e68d696 100644
--- a/plugins/inputs/diskio/README.md
+++ b/plugins/inputs/diskio/README.md
@@ -124,7 +124,7 @@ SELECT non_negative_derivative(last("io_time"),1ms) FROM "diskio" WHERE time > n
 #### Calculate average queue depth:
 `iops_in_progress` will give you an instantaneous value. This will give you the average between polling intervals.
 ```
-SELECT non_negative_derivative(last("weighted_io_time",1ms)) from "diskio" WHERE time > now() - 30m GROUP BY "host","name",time(60s)
+SELECT non_negative_derivative(last("weighted_io_time"),1ms) from "diskio" WHERE time > now() - 30m GROUP BY "host","name",time(60s)
 ```
 
 ### Example Output: