diff --git a/content/getting-started/configuration.md b/content/getting-started/configuration.md
index b81d878b3..2dafdb52b 100644
--- a/content/getting-started/configuration.md
+++ b/content/getting-started/configuration.md
@@ -111,6 +111,8 @@ googleAnalytics:            ""
 # if true, auto-detect Chinese/Japanese/Korean Languages in the content. (.Summary and .WordCount can work properly in CJKLanguage)
 hasCJKLanguage:             false
 languageCode:               ""
+# the length of text to show in a .Summary
+summaryLength:              70
 layoutDir:                  "layouts"
 # Enable Logging
 log:                        false
@@ -252,6 +254,8 @@ googleAnalytics =             ""
 # if true, auto-detect Chinese/Japanese/Korean Languages in the content. (.Summary and .WordCount can work properly in CJKLanguage)
 hasCJKLanguage =              false
 languageCode =                ""
+# the length of text to show in a .Summary
+summaryLength:              70
 layoutDir =                   "layouts"
 # Enable Logging
 log =                         false