1 files changed, 2 insertions, 0 deletions

diff --git a/tmk_core/protocol/lufa/bluetooth.h b/tmk_core/protocol/lufa/bluetooth.h
index 01f07e8e6..78ece1cd0 100644
--- a/tmk_core/protocol/lufa/bluetooth.h
+++ b/tmk_core/protocol/lufa/bluetooth.h
@@ -18,6 +18,8 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #ifndef BLUETOOTH_H
 #define BLUETOOTH_H
 
+#include "../serial.h"
+
 void bluefruit_serial_send(uint8_t data);
 
 /*