diff --git a/src/env.cxx b/src/env.cxx
index 571c9b6e2..0045954e2 100644
--- a/src/env.cxx
+++ b/src/env.cxx
@@ -129,6 +129,7 @@ get_env_var (tstring & value, tstring const & name)
         helpers::getLogLog().error(
             LOG4CPLUS_TEXT ("_dupenv_s failed. Error: ")
             + helpers::convertIntegerToString (eno), true);
+        std::unreachable ();
     }
 
     return !! buf;
diff --git a/src/hierarchy.cxx b/src/hierarchy.cxx
index 73b2306e0..6f9fde4af 100644
--- a/src/hierarchy.cxx
+++ b/src/hierarchy.cxx
@@ -294,6 +294,7 @@ Hierarchy::getInstanceImpl(const tstring_view& name,
             helpers::getLogLog().error(
                 LOG4CPLUS_TEXT("Hierarchy::getInstanceImpl()- Insert failed"),
                 true);
+            std::unreachable ();
         }
 
         if (auto pnm_it = provisionNodes.find(name); pnm_it != provisionNodes.end())
@@ -352,6 +353,7 @@ Hierarchy::updateParents(Logger const & logger)
                     helpers::getLogLog().error(
                         LOG4CPLUS_TEXT("Hierarchy::updateParents()- Insert failed"),
                         true);
+                    std::unreachable ();
                 }
             }
         } // end if Logger found