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-rw-r--r--extmod/virtpin.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/extmod/virtpin.h b/extmod/virtpin.h
index 041010350..706affc19 100644
--- a/extmod/virtpin.h
+++ b/extmod/virtpin.h
@@ -23,6 +23,8 @@
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
+#ifndef MICROPY_INCLUDED_EXTMOD_VIRTPIN_H
+#define MICROPY_INCLUDED_EXTMOD_VIRTPIN_H
#include "py/obj.h"
@@ -41,3 +43,5 @@ void mp_virtual_pin_write(mp_obj_t pin, int value);
// If a port exposes a Pin object, it's constructor should be like this
mp_obj_t mp_pin_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *args);
+
+#endif // MICROPY_INCLUDED_EXTMOD_VIRTPIN_H