diff --git a/keyboards/ploopyco/trackball_nano/keymaps/maddie/keymap.c b/keyboards/ploopyco/trackball_nano/keymaps/maddie/keymap.c
index 14a7804cc2..5e9b3e8e19 100644
--- a/keyboards/ploopyco/trackball_nano/keymaps/maddie/keymap.c
+++ b/keyboards/ploopyco/trackball_nano/keymaps/maddie/keymap.c
@@ -27,6 +27,10 @@
 bool scroll_enabled = false;
 bool lock_state     = false;
 
+// State
+static int8_t delta_x = 0;
+static int8_t delta_y = 0;
+
 // Dummy
 const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {{{ KC_NO }}};