diff --git a/include/searcher.h b/include/searcher.h
index d3c0315e8..8acf929ce 100644
--- a/include/searcher.h
+++ b/include/searcher.h
@@ -48,7 +48,7 @@ class Result
   virtual std::string get_content() = 0;
   virtual int get_wordCount() = 0;
   virtual int get_size() = 0;
-  virtual int get_readerIndex() = 0;
+  virtual std::string get_zimId() = 0;
 };
 
 struct SearcherInternal;
diff --git a/src/search_renderer.cpp b/src/search_renderer.cpp
index fa1c16dfa..0e503e330 100644
--- a/src/search_renderer.cpp
+++ b/src/search_renderer.cpp
@@ -77,9 +77,7 @@ std::string SearchRenderer::getHtml()
     result.set("title", p_result->get_title());
     result.set("url", p_result->get_url());
     result.set("snippet", p_result->get_snippet());
-    auto readerIndex = p_result->get_readerIndex();
-    auto reader = mp_searcher->get_reader(readerIndex);
-    result.set("resultContentId", mp_nameMapper->getNameForId(reader->getId()));
+    result.set("resultContentId", mp_nameMapper->getNameForId(p_result->get_zimId()));
 
     if (p_result->get_wordCount() >= 0) {
       result.set("wordCount", kiwix::beautifyInteger(p_result->get_wordCount()));
diff --git a/src/searcher.cpp b/src/searcher.cpp
index 65f6f25f8..6f3b54257 100644
--- a/src/searcher.cpp
+++ b/src/searcher.cpp
@@ -45,7 +45,7 @@ class _Result : public Result
   virtual std::string get_content();
   virtual int get_wordCount();
   virtual int get_size();
-  virtual int get_readerIndex();
+  virtual std::string get_zimId();
 
  private:
   zim::SearchResultSet::iterator iterator;
@@ -261,9 +261,11 @@ int _Result::get_wordCount()
 {
   return iterator.getWordCount();
 }
-int _Result::get_readerIndex()
+std::string _Result::get_zimId()
 {
-  return iterator.getFileIndex();
+  std::ostringstream s;
+  s << iterator.getZimId();
+  return s.str();
 }