diff --git a/src/libraries/System.Diagnostics.DiagnosticSource/src/System/Diagnostics/Metrics/MetricsEventSource.cs b/src/libraries/System.Diagnostics.DiagnosticSource/src/System/Diagnostics/Metrics/MetricsEventSource.cs
index 6d0517bc195e9..9923589b24627 100644
--- a/src/libraries/System.Diagnostics.DiagnosticSource/src/System/Diagnostics/Metrics/MetricsEventSource.cs
+++ b/src/libraries/System.Diagnostics.DiagnosticSource/src/System/Diagnostics/Metrics/MetricsEventSource.cs
@@ -374,11 +374,11 @@ private void ParseSpecs(string? metricsSpecs)
                 {
                     if (!MetricSpec.TryParse(specString, out MetricSpec spec))
                     {
-                        Log.Message("Failed to parse metric spec: {specString}");
+                        Log.Message($"Failed to parse metric spec: {specString}");
                     }
                     else
                     {
-                        Log.Message("Parsed metric: {spec}");
+                        Log.Message($"Parsed metric: {spec}");
                         if (spec.InstrumentName != null)
                         {
                             _aggregationManager!.Include(spec.MeterName, spec.InstrumentName);