diff --git a/src/AcDream.App/Rendering/GameWindow.cs b/src/AcDream.App/Rendering/GameWindow.cs
index 7eb151c..588e448 100644
--- a/src/AcDream.App/Rendering/GameWindow.cs
+++ b/src/AcDream.App/Rendering/GameWindow.cs
@@ -3491,12 +3491,14 @@ public sealed class GameWindow : IDisposable
             // velocity here. Preserve the sign — SideStepLeft is sometimes
             // emitted with negative speedMod by the adjust_motion path.
             //
-            // Magnitude: horizSpeed / WalkAnimSpeed maps the observed speed
-            // back to a speedMod the sequencer can apply as a framerate
-            // multiplier. WalkAnimSpeed is the reasonable base because
-            // sidestep cycles use the WalkAnim equivalent (no separate
-            // RunSidestep cycle in the dat).
-            float sideMag = horizSpeed / AcDream.Core.Physics.MotionInterpreter.WalkAnimSpeed;
+            // Magnitude: horizSpeed / SidestepAnimSpeed maps the observed
+            // speed back to a SideStepSpeed the sequencer can apply as a
+            // framerate multiplier. Retail's get_state_velocity for
+            // sidestep cycles is `velocity.X = SidestepAnimSpeed *
+            // SideStepSpeed` (MotionInterpreter.cs:592 — constant 1.25
+            // m/s). Dividing by WalkAnimSpeed (3.12) here was wrong by
+            // 2.5× and made slow strafe play visibly slower than retail.
+            float sideMag = horizSpeed / AcDream.Core.Physics.MotionInterpreter.SidestepAnimSpeed;
             sideMag = MathF.Min(MathF.Max(
                 sideMag,
                 AcDream.Core.Physics.ServerControlledLocomotion.MinSpeedMod),