diff --git a/src/ModelContextProtocol.Core/Diagnostics.cs b/src/ModelContextProtocol.Core/Diagnostics.cs
index 308d07c5a..097f21098 100644
--- a/src/ModelContextProtocol.Core/Diagnostics.cs
+++ b/src/ModelContextProtocol.Core/Diagnostics.cs
@@ -16,6 +16,8 @@ internal static Histogram<double> CreateDurationHistogram(string name, string de
         Meter.CreateHistogram<double>(name, "s", description
 #if NET9_0_OR_GREATER
         , advice: longBuckets ? LongSecondsBucketBoundaries : ShortSecondsBucketBoundaries
+#endif
+#if DEBUG
 #endif
         );