diff --git a/include/ureact/adaptor/tap.hpp b/include/ureact/adaptor/tap.hpp
index 92da696..3c49d47 100644
--- a/include/ureact/adaptor/tap.hpp
+++ b/include/ureact/adaptor/tap.hpp
@@ -37,7 +37,7 @@ class signal_tap_node final : public signal_node<S>
         this->detach_from_all();
     }
 
-    UREACT_WARN_UNUSED_RESULT update_result update() override
+    UREACT_WARN_UNUSED_RESULT core::update_result update() override
     {
         return this->try_change_value( get_internals( m_target ).get_value() );
     }
@@ -65,12 +65,13 @@ class event_tap_node final : public event_stream_node<E>
         this->detach_from_all();
     }
 
-    UREACT_WARN_UNUSED_RESULT update_result update() override
+    UREACT_WARN_UNUSED_RESULT core::update_result update() override
     {
         const auto& src_events = get_internals( m_target ).get_events();
         this->get_events() = src_events;
 
-        return !this->get_events().empty() ? update_result::changed : update_result::unchanged;
+        return !this->get_events().empty() ? core::update_result::changed
+                                           : core::update_result::unchanged;
     }
 
 private:
diff --git a/include/ureact/detail/temp_signal.hpp b/include/ureact/detail/temp_signal.hpp
index 7bcd7f8..356f754 100644
--- a/include/ureact/detail/temp_signal.hpp
+++ b/include/ureact/detail/temp_signal.hpp
@@ -41,7 +41,7 @@ class signal_op_node final : public signal_node<S>
         }
     }
 
-    UREACT_WARN_UNUSED_RESULT update_result update() override
+    UREACT_WARN_UNUSED_RESULT core::update_result update() override
     {
         return this->try_change_value( evaluate() );
     }
diff --git a/include/ureact/detail/zip_base.hpp b/include/ureact/detail/zip_base.hpp
index 4ae5e1b..7ffef5c 100644
--- a/include/ureact/detail/zip_base.hpp
+++ b/include/ureact/detail/zip_base.hpp
@@ -67,14 +67,15 @@ class event_zip_node final : public event_stream_node<zip_result_t<Type, F, Valu
         this->detach_from_all();
     }
 
-    UREACT_WARN_UNUSED_RESULT update_result update() override
+    UREACT_WARN_UNUSED_RESULT core::update_result update() override
     {
         fetch_buffers();
 
         while( are_all_slots_ready() )
             pop_slots_to_emit_event();
 
-        return !this->get_events().empty() ? update_result::changed : update_result::unchanged;
+        return !this->get_events().empty() ? core::update_result::changed
+                                           : core::update_result::unchanged;
     }
 
 private: