diff --git a/pkg/build/builder/source.go b/pkg/build/builder/source.go
index 450d86ab29d7..03ab901b38cf 100644
--- a/pkg/build/builder/source.go
+++ b/pkg/build/builder/source.go
@@ -267,6 +267,7 @@ func copyImageSource(dockerClient DockerClient, containerID, sourceDir, destDir
 		Path:         sourceDir,
 	})
 	if err != nil {
+		tempFile.Close()
 		return err
 	}
 	if err := tempFile.Close(); err != nil {