diff --git a/lib/json/encodeBook.js b/lib/json/encodeBook.js
index 336b12a33..ba199994e 100644
--- a/lib/json/encodeBook.js
+++ b/lib/json/encodeBook.js
@@ -15,7 +15,7 @@ function encodeBookToJson(book) {
         summary: encodeSummary(book.getSummary()),
         glossary: encodeGlossary(book.getGlossary()),
         readme: encodeReadme(book.getReadme()),
-        config: book.getCOnfig().getValues().toJS(),
+        config: book.getConfig().getValues().toJS(),
         gitbook: {
             version: gitbook.version,
             time: gitbook.START_TIME