diff --git a/keyboards/keebio/sinc/rev1/config.h b/keyboards/keebio/sinc/rev1/config.h
index 7fde38b58e4..c394777a8f8 100644
--- a/keyboards/keebio/sinc/rev1/config.h
+++ b/keyboards/keebio/sinc/rev1/config.h
@@ -23,6 +23,8 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define LOCKING_SUPPORT_ENABLE
 /* Locking resynchronize hack */
 #define LOCKING_RESYNC_ENABLE
+/* Synchronize Caps Lock LED across halves */
+#define SPLIT_LED_STATE_ENABLE
 
 /* ws2812 RGB LED */
 #define RGBLIGHT_LED_MAP { 1, 2, 3, 12, 13, 14, 15, 0, 7, 6, 5, 4, 11, 10, 9, 8 }
diff --git a/keyboards/keebio/sinc/rev2/config.h b/keyboards/keebio/sinc/rev2/config.h
index 7fde38b58e4..c394777a8f8 100644
--- a/keyboards/keebio/sinc/rev2/config.h
+++ b/keyboards/keebio/sinc/rev2/config.h
@@ -23,6 +23,8 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define LOCKING_SUPPORT_ENABLE
 /* Locking resynchronize hack */
 #define LOCKING_RESYNC_ENABLE
+/* Synchronize Caps Lock LED across halves */
+#define SPLIT_LED_STATE_ENABLE
 
 /* ws2812 RGB LED */
 #define RGBLIGHT_LED_MAP { 1, 2, 3, 12, 13, 14, 15, 0, 7, 6, 5, 4, 11, 10, 9, 8 }