diff --git a/src/timeman.cpp b/src/timeman.cpp
index 1253d434..9ff422fe 100644
--- a/src/timeman.cpp
+++ b/src/timeman.cpp
@@ -42,7 +42,6 @@ void TimeManagement::init(Search::LimitsType& limits, Color us, int ply) {
         return;
 
     TimePoint moveOverhead = TimePoint(Options["Move Overhead"]);
-    TimePoint slowMover    = TimePoint(Options["Slow Mover"]);
     TimePoint npmsec       = TimePoint(Options["nodestime"]);
 
     // optScale is a percentage of available time to use for the current move.
@@ -78,10 +77,6 @@ void TimeManagement::init(Search::LimitsType& limits, Color us, int ply) {
     double optConstant = std::min(0.00335 + 0.0003 * std::log10(limits.time[us] / 1000.0), 0.0048);
     double maxConstant = std::max(3.6 + 3.0 * std::log10(limits.time[us] / 1000.0), 2.7);
 
-    // A user may scale time usage by setting UCI option "Slow Mover"
-    // Default is 100 and changing this value will probably lose elo.
-    timeLeft = slowMover * timeLeft / 100;
-
     // x basetime (+ z increment)
     // If there is a healthy increment, timeLeft can exceed actual available
     // game time for the current move, so also cap to 20% of available game time.
diff --git a/src/ucioption.cpp b/src/ucioption.cpp
index d0db1c76..233602ca 100644
--- a/src/ucioption.cpp
+++ b/src/ucioption.cpp
@@ -73,7 +73,6 @@ void init(OptionsMap& o) {
     o["MultiPV"] << Option(1, 1, 500);
     o["Skill Level"] << Option(20, 0, 20);
     o["Move Overhead"] << Option(10, 0, 5000);
-    o["Slow Mover"] << Option(100, 10, 1000);
     o["nodestime"] << Option(0, 0, 10000);
     o["UCI_Chess960"] << Option(false);
     o["UCI_AnalyseMode"] << Option(false);