diff --git a/internal/sourcertmp/source.go b/internal/sourcertmp/source.go
index f87f72d9..a45a66b3 100644
--- a/internal/sourcertmp/source.go
+++ b/internal/sourcertmp/source.go
@@ -24,7 +24,7 @@ const (
 	retryPause = 5 * time.Second
 )
 
-// Parent is implemeneted by path.Path.
+// Parent is implemented by path.Path.
 type Parent interface {
 	Log(logger.Level, string, ...interface{})
 	OnExtSourceSetReady(req source.ExtSetReadyReq)
@@ -79,7 +79,7 @@ func (s *Source) Close() {
 // IsSource implements source.Source.
 func (s *Source) IsSource() {}
 
-// IsExtSource implements path.extSource.
+// IsExtSource implements source.ExtSource.
 func (s *Source) IsExtSource() {}
 
 func (s *Source) log(level logger.Level, format string, args ...interface{}) {
diff --git a/internal/sourcertsp/source.go b/internal/sourcertsp/source.go
index 4c38a481..c89fe5c0 100644
--- a/internal/sourcertsp/source.go
+++ b/internal/sourcertsp/source.go
@@ -90,7 +90,7 @@ func (s *Source) Close() {
 // IsSource implements source.Source.
 func (s *Source) IsSource() {}
 
-// IsExtSource implements path.extSource.
+// IsExtSource implements source.ExtSource.
 func (s *Source) IsExtSource() {}
 
 func (s *Source) log(level logger.Level, format string, args ...interface{}) {