diff --git a/src/CounterDrone.Core/Simulation/MunitionEntity.cs b/src/CounterDrone.Core/Simulation/MunitionEntity.cs
index 20eb65e..94ff05a 100644
--- a/src/CounterDrone.Core/Simulation/MunitionEntity.cs
+++ b/src/CounterDrone.Core/Simulation/MunitionEntity.cs
@@ -84,7 +84,7 @@ namespace CounterDrone.Core.Simulation
                     float tPrev = _time - deltaTime;
                     var (px0, py0, pz0) = Kinematics.ParabolicPosition(
                         _startX, _startY, _startZ, _launchAngle, _azimuth, _muzzleVelocity, tPrev);
-                    float frac = (ReleaseAltitude - py0) / Math.Max(0.01f, PosY - py0);
+                    float frac = (ReleaseAltitude - py0) / System.Math.Max(0.01f, PosY - py0);
                     PosX = px0 + (PosX - px0) * frac;
                     PosY = ReleaseAltitude;
                     PosZ = pz0 + (PosZ - pz0) * frac;