diff --git a/include/common/otherTools.h b/include/common/otherTools.h
index 9b3102f9b..212567f86 100644
--- a/include/common/otherTools.h
+++ b/include/common/otherTools.h
@@ -26,9 +26,12 @@
 #include <unistd.h>
 #endif
 
+#include <pugixml.hpp>
+
 namespace kiwix
 {
 void sleep(unsigned int milliseconds);
+std::string nodeToString(pugi::xml_node node);
 }
 
 #endif
diff --git a/src/common/otherTools.cpp b/src/common/otherTools.cpp
index 0cb852376..b57add752 100644
--- a/src/common/otherTools.cpp
+++ b/src/common/otherTools.cpp
@@ -27,3 +27,19 @@ void kiwix::sleep(unsigned int milliseconds)
   usleep(1000 * milliseconds);
 #endif
 }
+
+
+struct XmlStringWriter: pugi::xml_writer
+{
+  std::string result;
+  virtual void write(const void* data, size_t size){
+    result.append(static_cast<const char*>(data), size);
+  }
+};
+
+std::string kiwix::nodeToString(pugi::xml_node node)
+{
+  XmlStringWriter writer;
+  node.print(writer, "  ");
+  return writer.result;
+}
diff --git a/src/opds_dumper.cpp b/src/opds_dumper.cpp
index 63dce8542..9aa31bb51 100644
--- a/src/opds_dumper.cpp
+++ b/src/opds_dumper.cpp
@@ -19,6 +19,9 @@
 
 #include "opds_dumper.h"
 
+
+#include <common/otherTools.h>
+
 namespace kiwix
 {
 /* Constructor */
@@ -31,24 +34,6 @@ OPDSDumper::~OPDSDumper()
 {
 }
 
-struct xml_string_writer: pugi::xml_writer
-{
-    std::string result;
-
-    virtual void write(const void* data, size_t size)
-    {
-        result.append(static_cast<const char*>(data), size);
-    }
-};
-
-std::string node_to_string(pugi::xml_node node)
-{
-    xml_string_writer writer;
-    node.print(writer, "  ");
-
-    return writer.result;
-}
-
 std::string gen_date_str()
 {
   auto now = time(0);
@@ -129,7 +114,7 @@ string OPDSDumper::dumpOPDSFeed()
     handleBook(book, root_node);
   }
 
-  return node_to_string(root_node);
+  return nodeToString(root_node);
 }
 
 }