diff --git a/base b/base
index 095b0281c..fae267c3b 160000
--- a/base
+++ b/base
@@ -1 +1 @@
-Subproject commit 095b0281ccfd77b38d6291827bf32a1d5237531e
+Subproject commit fae267c3b98e4ba5f36eba40b9f5e21a12125ccf
diff --git a/frontend/document/credocument.lua b/frontend/document/credocument.lua
index 68fef05c3..3293fb9f5 100644
--- a/frontend/document/credocument.lua
+++ b/frontend/document/credocument.lua
@@ -1287,6 +1287,14 @@ function CreDocument:buildAlternativeToc()
     self._document:buildAlternativeToc()
 end
 
+function CreDocument:buildSyntheticPageMapIfNoneDocumentProvided(chars_per_synthetic_page)
+    self._document:buildSyntheticPageMapIfNoneDocumentProvided(chars_per_synthetic_page or 1024)
+end
+
+function CreDocument:isPageMapSynthetic()
+    return self._document:isPageMapSynthetic()
+end
+
 function CreDocument:hasPageMap()
     return self._document:hasPageMap()
 end