build: Fix compilation with tests and precompiled headers enabled

Change-Id: I996c06e1340cc5d1e731daf879b209c2976fe0e0
Refs: #2102
diff --git a/tests/unit-tests/test-name.cpp b/tests/unit-tests/test-name.cpp
index 5bc6f6b..785321a 100644
--- a/tests/unit-tests/test-name.cpp
+++ b/tests/unit-tests/test-name.cpp
@@ -191,8 +191,8 @@
   Timestamp()
   {
     dataset.push_back(boost::make_tuple(&name::Component::fromTimestamp,
-                                        bind(&name::Component::toTimestamp, _1),
-                                        bind(&Name::appendTimestamp, _1, _2),
+                                        ndn::bind(&name::Component::toTimestamp, _1),
+                                        ndn::bind(&Name::appendTimestamp, _1, _2),
                                         Name("/%FC%00%04%7BE%E3%1B%00%00"),
                                         time::getUnixEpoch() + time::days(14600/*40 years*/),
                                         bind(&name::Component::isTimestamp, _1)));