diff --git a/libretroshare/src/dbase/findex.cc b/libretroshare/src/dbase/findex.cc
index 368c1b74b..d925cbadc 100644
--- a/libretroshare/src/dbase/findex.cc
+++ b/libretroshare/src/dbase/findex.cc
@@ -31,6 +31,7 @@
 #include <algorithm>
 #include <iostream>
 #include <sstream>
+#include <tr1/unordered_set>
 #include <iomanip>
 #include <fstream>
 #include <sys/stat.h>
@@ -50,7 +51,7 @@ static const char FILE_CACHE_SEPARATOR_CHAR = '|' ;
  ****/
 
 static RsMutex FIndexPtrMtx ;
-std::set<void*> FileIndex::_pointers ;
+std::tr1::unordered_set<void*> FileIndex::_pointers ;
 
 void FileIndex::registerEntry(void*p)
 {
diff --git a/libretroshare/src/dbase/findex.h b/libretroshare/src/dbase/findex.h
index bd0eea2a6..29c4089d4 100644
--- a/libretroshare/src/dbase/findex.h
+++ b/libretroshare/src/dbase/findex.h
@@ -27,6 +27,7 @@
 #include <string>
 #include <map>
 #include <set>
+#include <tr1/unordered_set>
 #include <list>
 #include <vector>
 #include <stdint.h>
@@ -245,7 +246,7 @@ class FileIndex
 
 		PersonEntry *root;
 
-		static std::set<void*> _pointers ;
+		static std::tr1::unordered_set<void*> _pointers ;
 		static void registerEntry(void*p) ; 
 		static void unregisterEntry(void*p) ; 
 		static bool isValid(void*p)  ;