diff --git a/tracer/build/_build/MetricHelper.cs b/tracer/build/_build/MetricHelper.cs
index f92f7877b657..ca00c0a3bebd 100644
--- a/tracer/build/_build/MetricHelper.cs
+++ b/tracer/build/_build/MetricHelper.cs
@@ -91,7 +91,7 @@ private static string SanitizeTagValue(string tag)
         static bool TryNormalizeTagName(
             string value,
             bool normalizeSpaces,
-            [NotNullWhen(returnValue: true)] out string? normalizedTagName)
+            [NotNullWhen(returnValue: true)] out string normalizedTagName)
         {
             normalizedTagName = null;
 
@@ -123,7 +123,7 @@ static bool TryNormalizeTagName(
 
         static bool IsValidTagName(
             string value,
-            [NotNullWhen(returnValue: true)] out string? trimmedValue)
+            [NotNullWhen(returnValue: true)] out string trimmedValue)
         {
             trimmedValue = null;