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-rw-r--r--keyboards/lets_split/config.h7
1 files changed, 6 insertions, 1 deletions
diff --git a/keyboards/lets_split/config.h b/keyboards/lets_split/config.h
index ec99514aa3..f4d900accb 100644
--- a/keyboards/lets_split/config.h
+++ b/keyboards/lets_split/config.h
@@ -41,6 +41,11 @@ along with this program. If not, see <http://www.gnu.org/licenses/>.
// #define USE_I2C
+// Use serial if not using I2C
+#ifndef USE_I2C
+# define USE_SERIAL
+#endif
+
// #define EE_HANDS
#define I2C_MASTER_LEFT
@@ -94,4 +99,4 @@ along with this program. If not, see <http://www.gnu.org/licenses/>.
//#define NO_ACTION_MACRO
//#define NO_ACTION_FUNCTION
-#endif \ No newline at end of file
+#endif