diff --git a/arduino/builder/builder.go b/arduino/builder/builder.go
index 2c058456f74..06ab9662676 100644
--- a/arduino/builder/builder.go
+++ b/arduino/builder/builder.go
@@ -375,7 +375,7 @@ func (b *Builder) build() error {
 	b.Progress.CompleteStep()
 	b.Progress.PushProgress()
 
-	if err := b.BuildSketch(b.libsDetector.IncludeFolders()); err != nil {
+	if err := b.buildSketch(b.libsDetector.IncludeFolders()); err != nil {
 		return err
 	}
 	b.Progress.CompleteStep()
@@ -468,7 +468,7 @@ func (b *Builder) build() error {
 	b.Progress.CompleteStep()
 	b.Progress.PushProgress()
 
-	if err := b.MergeSketchWithBootloader(); err != nil {
+	if err := b.mergeSketchWithBootloader(); err != nil {
 		return err
 	}
 	b.Progress.CompleteStep()
diff --git a/arduino/builder/sketch.go b/arduino/builder/sketch.go
index 46f2e82771e..3a7c21f3ded 100644
--- a/arduino/builder/sketch.go
+++ b/arduino/builder/sketch.go
@@ -173,8 +173,8 @@ func writeIfDifferent(source []byte, destPath *paths.Path) error {
 	return nil
 }
 
-// BuildSketch fixdoc
-func (b *Builder) BuildSketch(includesFolders paths.PathList) error {
+// buildSketch fixdoc
+func (b *Builder) buildSketch(includesFolders paths.PathList) error {
 	includes := f.Map(includesFolders.AsStrings(), cpp.WrapWithHyphenI)
 
 	if err := b.sketchBuildPath.MkdirAll(); err != nil {
@@ -208,8 +208,8 @@ func (b *Builder) BuildSketch(includesFolders paths.PathList) error {
 	return nil
 }
 
-// MergeSketchWithBootloader fixdoc
-func (b *Builder) MergeSketchWithBootloader() error {
+// mergeSketchWithBootloader fixdoc
+func (b *Builder) mergeSketchWithBootloader() error {
 	if b.onlyUpdateCompilationDatabase {
 		return nil
 	}