diff --git a/src/Spectre.Console/Internal/Colors/ColorSystemDetector.cs b/src/Spectre.Console/Internal/Colors/ColorSystemDetector.cs
index 1e211ab..c494500 100644
--- a/src/Spectre.Console/Internal/Colors/ColorSystemDetector.cs
+++ b/src/Spectre.Console/Internal/Colors/ColorSystemDetector.cs
@@ -25,7 +25,7 @@ namespace Spectre.Console
 
                 var os = Environment.OSVersion;
                 var major = os.Version.Major;
-                var build = os.Version.Minor;
+                var build = os.Version.Build;
 
                 if (major > 10)
                 {