diff --git a/downloader.go b/downloader.go
index e7cce15..d5156c4 100644
--- a/downloader.go
+++ b/downloader.go
@@ -146,10 +146,6 @@ func (client *Downloader) Close() error {
 		return nil
 	}
 
-	if client.state.Type == TransmittingFile {
-		return ErrInvalidState
-	}
-
 	client.dataChannel.Close()
 	return nil
 }
diff --git a/uploader.go b/uploader.go
index 8940bed..ff7f680 100644
--- a/uploader.go
+++ b/uploader.go
@@ -106,10 +106,6 @@ func (server *Uploader) Close() error {
 		return nil
 	}
 
-	if server.state.Type == TransmittingFile {
-		return ErrInvalidState
-	}
-
 	server.dataChannel.Close()
 	return nil
 }