diff --git a/Projects/Server/Main.cs b/Projects/Server/Main.cs
index d25827f6a..d5eae2b32 100644
--- a/Projects/Server/Main.cs
+++ b/Projects/Server/Main.cs
@@ -346,8 +346,20 @@ public static class Core
         }
     }
 
+    private static readonly bool UseFastTimestampMath = Stopwatch.Frequency % 1000 == 0;
+    private static readonly ulong FrequencyInMilliseconds = (ulong)Stopwatch.Frequency / 1000;
+
     [MethodImpl(MethodImplOptions.AggressiveInlining)]
-    public static long GetTimestamp() => 1000L * Stopwatch.GetTimestamp() / Stopwatch.Frequency;
+    public static long GetTimestamp()
+    {
+        if (UseFastTimestampMath)
+        {
+            return (long)((ulong)Stopwatch.GetTimestamp() / FrequencyInMilliseconds);
+        }
+
+        // Fast calculation will be lossy, fallback to slower but accurate calculation
+        return (long)((UInt128)Stopwatch.GetTimestamp() * 1000 / (ulong)Stopwatch.Frequency);
+    }
 
     public static void Setup(Assembly applicationAssembly, Process process)
     {