diff --git a/fanficdownloader/output.py b/fanficdownloader/output.py
index 98c9382..da7503e 100644
--- a/fanficdownloader/output.py
+++ b/fanficdownloader/output.py
@@ -406,7 +406,7 @@ class EPubFanficWriter(FanficWriter):
 
 		t = "Title Page"
 		f = "title_page.xhtml"
-		chapterId = "Title Page"		
+		chapterId = "title_page"		
 		self._writeFile(tocFilePath, TOC_ITEM % (chapterId, i, t, f))
 		self._writeFile(opfFilePath, CONTENT_ITEM % (chapterId, f))