diff --git a/src/core/thread/mesh_forwarder.cpp b/src/core/thread/mesh_forwarder.cpp
index 7e35596af..8d1a8816d 100644
--- a/src/core/thread/mesh_forwarder.cpp
+++ b/src/core/thread/mesh_forwarder.cpp
@@ -1197,13 +1197,6 @@ void MeshForwarder::HandleSentFrame(Mac::Frame &aFrame, ThreadError aError)
                     mMle.RemoveNeighbor(*neighbor);
                 }
             }
-            else
-            {
-                if (neighbor->mLinkFailures >= Mle::kFailedChildTransmissions)
-                {
-                    mMle.RemoveNeighbor(*neighbor);
-                }
-            }
 
             break;
 
diff --git a/src/core/thread/mle_constants.hpp b/src/core/thread/mle_constants.hpp
index 851b2c097..54bb3072e 100644
--- a/src/core/thread/mle_constants.hpp
+++ b/src/core/thread/mle_constants.hpp
@@ -46,7 +46,6 @@ enum
 {
     kMaxChildren                = OPENTHREAD_CONFIG_MAX_CHILDREN,
     kMaxChildKeepAliveAttempts  = 4,    ///< Maximum keep alive attempts before attempting to reattach to a new Parent
-    kFailedChildTransmissions   = 4,    ///< FAILED_CHILD_TRANSMISSIONS
 };
 
 /**