diff --git a/opentelemetry/proto/metrics/v1/metrics.proto b/opentelemetry/proto/metrics/v1/metrics.proto
index 31f801e28..14bfbba24 100644
--- a/opentelemetry/proto/metrics/v1/metrics.proto
+++ b/opentelemetry/proto/metrics/v1/metrics.proto
@@ -536,8 +536,8 @@ message ExponentialHistogramDataPoint {
     // Note: This uses a varint encoding as a simple form of compression.
     sint32 offset = 1;
 
-    // BucketCounts is an array of count values, where BucketCounts[i] carries
-    // the count of the bucket at index (offset+i). BucketCounts[i] is the count
+    // bucket_counts is an array of count values, where bucket_counts[i] carries
+    // the count of the bucket at index (offset+i). bucket_counts[i] is the count
     // of values greater than base^(offset+i) and less than or equal to
     // base^(offset+i+1).
     //