diff --git a/internal/io/limitedwriter.go b/internal/io/limitedwriter.go
index 7a1990ba..a42bb258 100644
--- a/internal/io/limitedwriter.go
+++ b/internal/io/limitedwriter.go
@@ -21,6 +21,7 @@ import (
 	"io"
 )
 
+// ErrLimitExceeded is returned when the write limit is exceeded.
 var ErrLimitExceeded = errors.New("write limit exceeded")
 
 // LimitedWriter is a writer that writes to an underlying writer up to a limit.