diff --git a/setupapi/setupapi_windows_test.go b/setupapi/setupapi_windows_test.go
index 2325164..e6b00c9 100644
--- a/setupapi/setupapi_windows_test.go
+++ b/setupapi/setupapi_windows_test.go
@@ -169,7 +169,7 @@ func TestDevInfo_BuildDriverInfoList(t *testing.T) {
 				continue
 			}
 
-			if driverData2, err2 := driverData.ToGo().ToWindows(); err2 != nil || *driverData2 != *driverData {
+			if driverData2, err2 := driverData.toGo().toWindows(); err2 != nil || *driverData2 != *driverData {
 				t.Error("Error converting between SP_DRVINFO_DATA and DrvInfoData")
 			}
 
diff --git a/setupapi/types_windows.go b/setupapi/types_windows.go
index 1fb9a8f..7d16d43 100644
--- a/setupapi/types_windows.go
+++ b/setupapi/types_windows.go
@@ -326,7 +326,7 @@ type SP_DRVINFO_DATA struct {
 	DriverVersion uint64
 }
 
-func (data *SP_DRVINFO_DATA) ToGo() *DrvInfoData {
+func (data *SP_DRVINFO_DATA) toGo() *DrvInfoData {
 	return &DrvInfoData{
 		DriverType:    data.DriverType,
 		Description:   windows.UTF16ToString(data.Description[:]),
@@ -373,7 +373,7 @@ type DrvInfoData struct {
 	DriverVersion uint64
 }
 
-func (DriverInfoData *DrvInfoData) ToWindows() (data *SP_DRVINFO_DATA, err error) {
+func (DriverInfoData *DrvInfoData) toWindows() (data *SP_DRVINFO_DATA, err error) {
 	data = &SP_DRVINFO_DATA{
 		DriverType:    DriverInfoData.DriverType,
 		DriverDate:    DriverInfoData.DriverDate,