diff --git a/src/Microsoft.Diagnostics.EventFlow.Inputs.EventSource/EventDataExtensions.cs b/src/Microsoft.Diagnostics.EventFlow.Inputs.EventSource/EventDataExtensions.cs
index 7e5af844..035832fb 100644
--- a/src/Microsoft.Diagnostics.EventFlow.Inputs.EventSource/EventDataExtensions.cs
+++ b/src/Microsoft.Diagnostics.EventFlow.Inputs.EventSource/EventDataExtensions.cs
@@ -25,7 +25,9 @@ internal static class EventDataExtensions
         [DllImport("Kernel32.dll", CallingConvention = CallingConvention.Winapi)]
         private static extern void GetSystemTimePreciseAsFileTime(out long filetime);
 
-        private static bool hasPreciseTime = Environment.OSVersion.Version.Major >= 10 || (Environment.OSVersion.Version.Major == 6 && Environment.OSVersion.Version.Minor >= 2);
+        private static bool hasPreciseTime = 
+            Environment.OSVersion.Platform == PlatformID.Win32NT &&
+            (Environment.OSVersion.Version.Major >= 10 || (Environment.OSVersion.Version.Major == 6 && Environment.OSVersion.Version.Minor >= 2));
 #endif
 
         public static EventData ToEventData(this EventWrittenEventArgs eventSourceEvent, IHealthReporter healthReporter, string context)
diff --git a/test/Microsoft.Diagnostics.EventFlow.Inputs.Tests/EventSourceInputTests.cs b/test/Microsoft.Diagnostics.EventFlow.Inputs.Tests/EventSourceInputTests.cs
index ad72a60a..98244a0e 100644
--- a/test/Microsoft.Diagnostics.EventFlow.Inputs.Tests/EventSourceInputTests.cs
+++ b/test/Microsoft.Diagnostics.EventFlow.Inputs.Tests/EventSourceInputTests.cs
@@ -130,6 +130,12 @@ public void CapturesEventsFromEventSourceCreatedAfterInputCreated()
         [Fact]
         public void MeasuresEventTimeWithHighResolution()
         {
+            if (Environment.OSVersion.Platform != PlatformID.Win32NT)
+            {
+                // We only use explicit high-precision timestamping on Windows, relying on .NET implementation defaults for other platforms
+                return;
+            }
+
             var healthReporterMock = new Mock<IHealthReporter>();
 
             // Ensure the EventSource is instantiated