diff --git a/daemon/fw/forwarder.hpp b/daemon/fw/forwarder.hpp
index cad9396..373d395 100644
--- a/daemon/fw/forwarder.hpp
+++ b/daemon/fw/forwarder.hpp
@@ -251,7 +251,7 @@
   NetworkRegionTable m_networkRegionTable;
 
   // allow Strategy (base class) to enter pipelines
-  friend fw::Strategy;
+  friend ::nfd::fw::Strategy;
 };
 
 } // namespace nfd
diff --git a/daemon/table/fib-entry.hpp b/daemon/table/fib-entry.hpp
index 13825b7..c300208 100644
--- a/daemon/table/fib-entry.hpp
+++ b/daemon/table/fib-entry.hpp
@@ -115,7 +115,7 @@
 
   name_tree::Entry* m_nameTreeEntry = nullptr;
 
-  friend name_tree::Entry;
+  friend ::nfd::name_tree::Entry;
   friend Fib;
 };
 
diff --git a/daemon/table/measurements-entry.hpp b/daemon/table/measurements-entry.hpp
index 56825b6..a3983ae 100644
--- a/daemon/table/measurements-entry.hpp
+++ b/daemon/table/measurements-entry.hpp
@@ -62,8 +62,8 @@
 
   name_tree::Entry* m_nameTreeEntry = nullptr;
 
+  friend ::nfd::name_tree::Entry;
   friend Measurements;
-  friend name_tree::Entry;
 };
 
 } // namespace nfd::measurements
diff --git a/daemon/table/pit-entry.hpp b/daemon/table/pit-entry.hpp
index 6287e44..bc4f1d3 100644
--- a/daemon/table/pit-entry.hpp
+++ b/daemon/table/pit-entry.hpp
@@ -241,7 +241,7 @@
 
   name_tree::Entry* m_nameTreeEntry = nullptr;
 
-  friend name_tree::Entry;
+  friend ::nfd::name_tree::Entry;
 };
 
 } // namespace nfd::pit
diff --git a/daemon/table/strategy-choice-entry.hpp b/daemon/table/strategy-choice-entry.hpp
index a47337f..0c0963f 100644
--- a/daemon/table/strategy-choice-entry.hpp
+++ b/daemon/table/strategy-choice-entry.hpp
@@ -80,7 +80,8 @@
   unique_ptr<fw::Strategy> m_strategy;
 
   name_tree::Entry* m_nameTreeEntry = nullptr;
-  friend name_tree::Entry;
+
+  friend ::nfd::name_tree::Entry;
 };
 
 } // namespace nfd::strategy_choice