diff --git a/plugins/inputs/prometheus/README.md b/plugins/inputs/prometheus/README.md
index b486740c7..b1c0b6bab 100644
--- a/plugins/inputs/prometheus/README.md
+++ b/plugins/inputs/prometheus/README.md
@@ -123,7 +123,7 @@ See the [CONFIGURATION.md][CONFIGURATION.md] for more details.
   # password = ""
 
   ## Optional custom HTTP headers
-  # headers = {"X-Special-Header" = "Special-Value"}
+  # http_headers = {"X-Special-Header" = "Special-Value"}
 
   ## Specify timeout duration for slower prometheus clients (default is 3s)
   # response_timeout = "3s"
diff --git a/plugins/inputs/prometheus/sample.conf b/plugins/inputs/prometheus/sample.conf
index 39e8c8fbc..3ddee6be4 100644
--- a/plugins/inputs/prometheus/sample.conf
+++ b/plugins/inputs/prometheus/sample.conf
@@ -106,7 +106,7 @@
   # password = ""
 
   ## Optional custom HTTP headers
-  # headers = {"X-Special-Header" = "Special-Value"}
+  # http_headers = {"X-Special-Header" = "Special-Value"}
 
   ## Specify timeout duration for slower prometheus clients (default is 3s)
   # response_timeout = "3s"