diff --git a/instrumentation/database/sql/splunksql/config.go b/instrumentation/database/sql/splunksql/config.go
index 4da93627d..81c71bd12 100644
--- a/instrumentation/database/sql/splunksql/config.go
+++ b/instrumentation/database/sql/splunksql/config.go
@@ -48,6 +48,7 @@ func (c config) tracer(ctx context.Context) trace.Tracer {
 
 // withClientSpan wraps the function f with a span.
 func (c config) withClientSpan(ctx context.Context, name moniker.Span, f func(context.Context) error, opts ...trace.SpanStartOption) error {
+	// From the specification: span kind MUST always be CLIENT.
 	opts = append(opts, trace.WithSpanKind(trace.SpanKindClient))
 
 	var (