diff --git a/plugins/inputs/mysql/mysql.go b/plugins/inputs/mysql/mysql.go
index ad2fe958a..ece5e1447 100644
--- a/plugins/inputs/mysql/mysql.go
+++ b/plugins/inputs/mysql/mysql.go
@@ -69,13 +69,13 @@ var sampleConfig = `
   ## gather metrics from SHOW BINARY LOGS command output
   gather_binary_logs                        = false
   #
-  ## gather metrics from PERFORMANCE_SCHEMA.TABLE_IO_WAITS_SUMMART_BY_TABLE
+  ## gather metrics from PERFORMANCE_SCHEMA.TABLE_IO_WAITS_SUMMARY_BY_TABLE
   gather_table_io_waits                     = false
   #
   ## gather metrics from PERFORMANCE_SCHEMA.TABLE_LOCK_WAITS
   gather_table_lock_waits                   = false
   #
-  ## gather metrics from PERFORMANCE_SCHEMA.TABLE_IO_WAITS_SUMMART_BY_INDEX_USAGE
+  ## gather metrics from PERFORMANCE_SCHEMA.TABLE_IO_WAITS_SUMMARY_BY_INDEX_USAGE
   gather_index_io_waits                     = false
   #
   ## gather metrics from PERFORMANCE_SCHEMA.EVENT_WAITS