diff --git a/fdbserver/Knobs.cpp b/fdbserver/Knobs.cpp
index d87660a85e..74189e22a7 100644
--- a/fdbserver/Knobs.cpp
+++ b/fdbserver/Knobs.cpp
@@ -266,10 +266,6 @@ void ServerKnobs::initialize(bool randomize, ClientKnobs* clientKnobs, bool isSi
 
 	init( DD_REMOVE_STORE_ENGINE_DELAY,                         60.0 ); if( randomize && BUGGIFY ) DD_REMOVE_STORE_ENGINE_DELAY =  deterministicRandom()->random01() * 60.0;
 
-	// Redwood Storage Engine
-	init( PREFIX_TREE_IMMEDIATE_KEY_SIZE_LIMIT,                   30 );
-	init( PREFIX_TREE_IMMEDIATE_KEY_SIZE_MIN,                      0 );
-
 	// KeyValueStore SQLITE
 	init( CLEAR_BUFFER_SIZE,                                   20000 );
 	init( READ_VALUE_TIME_ESTIMATE,                           .00005 );
diff --git a/fdbserver/Knobs.h b/fdbserver/Knobs.h
index 8b2f8963f1..2ded8f312b 100644
--- a/fdbserver/Knobs.h
+++ b/fdbserver/Knobs.h
@@ -222,10 +222,6 @@ public:
 	double DD_FAILURE_TIME;
 	double DD_ZERO_HEALTHY_TEAM_DELAY;
 
-	// Redwood Storage Engine
-	int PREFIX_TREE_IMMEDIATE_KEY_SIZE_LIMIT;
-	int PREFIX_TREE_IMMEDIATE_KEY_SIZE_MIN;
-
 	// KeyValueStore SQLITE
 	int CLEAR_BUFFER_SIZE;
 	double READ_VALUE_TIME_ESTIMATE;