diff --git a/lib/Epub/Epub/parsers/ChapterHtmlSlimParser.cpp b/lib/Epub/Epub/parsers/ChapterHtmlSlimParser.cpp
index a56f4b75..f3955d8a 100644
--- a/lib/Epub/Epub/parsers/ChapterHtmlSlimParser.cpp
+++ b/lib/Epub/Epub/parsers/ChapterHtmlSlimParser.cpp
@@ -292,7 +292,7 @@ bool ChapterHtmlSlimParser::flushPartWordBuffer() {
       if (!ensureHeapForTextLayout("long-block split")) {
         partWordBufferIndex = 0;
         nextWordContinues = false;
-        return;
+        return false;
       }
       LOG_DBG("EHP", "Text block too long, splitting into multiple pages");
       const int horizontalInset = currentTextBlock->getBlockStyle().totalHorizontalInset();