diff --git a/src/configuration.h b/src/configuration.h
index 267420878..4fd395fd7 100644
--- a/src/configuration.h
+++ b/src/configuration.h
@@ -343,7 +343,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #undef GPS_RX_PIN
 #undef GPS_TX_PIN
 #define GPS_RX_PIN 36
-#define GPS_TX_PIN 39
+#define GPS_TX_PIN 13
 
 #define BATTERY_PIN 35 // A battery voltage measurement pin, voltage divider connected here to measure battery voltage