diff --git a/keyboards/maartenwut/wonderland/config.h b/keyboards/maartenwut/wonderland/config.h
index d315732cf204..54e9f25502b9 100755
--- a/keyboards/maartenwut/wonderland/config.h
+++ b/keyboards/maartenwut/wonderland/config.h
@@ -29,7 +29,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 /* key matrix size */
 #define MATRIX_ROWS 5
-#define MATRIX_COLS 16
+#define MATRIX_COLS 15
 
 // ROWS: Top to bottom, COLS: Left to right