diff --git a/src/common/kiwix/reader.cpp b/src/common/kiwix/reader.cpp
index b0d1a7e17..39af3f92d 100644
--- a/src/common/kiwix/reader.cpp
+++ b/src/common/kiwix/reader.cpp
@@ -35,8 +35,9 @@ unsigned int Reader::getArticleCount() {
 
 /* Return the UID of the ZIM file */
 string Reader::getId() {
-  return string(this->zimFileHandler->getFileheader().getUuid().data, 
-		this->zimFileHandler->getFileheader().getUuid().size());
+  std::ostringstream s;
+  s << this->zimFileHandler->getFileheader().getUuid();
+  return  s.str();
 }
  
 /* Return a random article URL */
diff --git a/src/common/kiwix/reader.h b/src/common/kiwix/reader.h
index de15ede38..2ba53a67f 100644
--- a/src/common/kiwix/reader.h
+++ b/src/common/kiwix/reader.h
@@ -6,6 +6,7 @@
 #include <zim/article.h>
 #include <zim/fileiterator.h>
 #include <string>
+#include <sstream>
 
 using namespace std;