diff --git a/config_options.md b/config_options.md
index b661b55ee0d..15ad945b227 100644
--- a/config_options.md
+++ b/config_options.md
@@ -61,6 +61,8 @@ This is a C header file that is one of the first things included, and will persi
   * pins unused by the keyboard for reference
 * `#define MATRIX_HAS_GHOST`
   * define is matrix has ghost (unlikely)
+* `#define MATRIX_UNSELECT_DRIVE_HIGH`
+  * On un-select of matrix pins, rather than setting pins to input-high, sets them to output-high.
 * `#define DIODE_DIRECTION COL2ROW`
   * COL2ROW or ROW2COL - how your matrix is configured. COL2ROW means the black mark on your diode is facing to the rows, and between the switch and the rows.
 * `#define DIRECT_PINS { { F1, F0, B0, C7 }, { F4, F5, F6, F7 } }`