diff --git a/src/intrusive_links.h b/src/intrusive_links.h
index 00ebb14f..47e46a22 100644
--- a/src/intrusive_links.h
+++ b/src/intrusive_links.h
@@ -114,6 +114,11 @@ namespace etl
         OPTION = OPTION_
       };
 
+      forward_link_base()
+      {
+        clear();
+      }
+
       void clear()
       {
         etl_next = nullptr;
@@ -329,6 +334,11 @@ namespace etl
         OPTION = OPTION_
       };
 
+      bidirectional_link_base()
+      {
+        clear();
+      }
+
       void clear()
       {
         etl_previous = nullptr;
@@ -662,6 +672,11 @@ namespace etl
         OPTION = OPTION_
       };
 
+      tree_link_base()
+      {
+        clear();
+      }
+
       void clear()
       {
         etl_parent = nullptr;