diff --git a/exporters/prometheus/exporter.go b/exporters/prometheus/exporter.go
index 95f7e4db84c..51478280ab6 100644
--- a/exporters/prometheus/exporter.go
+++ b/exporters/prometheus/exporter.go
@@ -43,7 +43,7 @@ type collector struct {
 	reader metric.Reader
 }
 
-// prometheus counters MUST have a _total suffix:
+// Prometheus counters MUST have a _total suffix:
 // https://github.com/open-telemetry/opentelemetry-specification/blob/v1.14.0/specification/metrics/data-model.md#sums-1
 const counterSuffix = "_total"