diff --git a/lib/api/encodeGlobal.js b/lib/api/encodeGlobal.js
index 8e3456a87..f7ca6491f 100644
--- a/lib/api/encodeGlobal.js
+++ b/lib/api/encodeGlobal.js
@@ -31,7 +31,7 @@ function encodeGlobal(output) {
     var result = {
         log: logger,
         config: encodeConfig(output, book.getConfig()),
-        summary: encodeSummary(output. book.getSummary()),
+        summary: encodeSummary(output, book.getSummary()),
 
         /**
             Check if the book is a multilingual book