diff --git a/keyboards/keyboardio/atreus/keymaps/dshields/keymap.c b/keyboards/keyboardio/atreus/keymaps/dshields/keymap.c
new file mode 100644
index 00000000000..e9daa7fab87
--- /dev/null
+++ b/keyboards/keyboardio/atreus/keymaps/dshields/keymap.c
@@ -0,0 +1,45 @@
+/* Copyright 2021 Daniel Shields
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#include QMK_KEYBOARD_H
+#include "dshields.h"
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+    [DEF] = LAYOUT(
+        KC_Q,    KC_W,    KC_E,    KC_R,    KC_T,                      KC_Y,    KC_U,    KC_I,    KC_O,    KC_P   ,
+        KC_A,    KC_S,    KC_D,    KC_F,    KC_G,                      KC_H,    KC_J,    KC_K,    KC_L,    KC_SCLN,
+        KC_Z,    KC_X,    KC_C,    KC_V,    KC_B,    KC_TAB,  KC_ENT,  KC_N,    KC_M,    KC_COMM, KC_DOT,  KC_SLSH,
+        OSMLCTL, MT_ESC,  OSMLALT, OSL_FUN, MT_BSPC, OSL_LWR, OSL_RSE, MT_SPC,  KC_LEFT, KC_DOWN, KC_UP,   KC_RGHT
+    ),
+    [LWR] = LAYOUT(
+        KC_EXLM, KC_AT,   KC_HASH, KC_DLR,  KC_PERC,                   KC_CIRC, KC_AMPR, KC_ASTR, KC_LPRN, KC_RPRN,
+        KC_TILD, _______, _______, _______, _______,                   KC_UNDS, KC_PLUS, _______, KC_LCBR, KC_RCBR,
+        _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, KC_DQUO, KC_PIPE,
+        _______, _______, _______, _______, KC_DEL,  _______, _______, KC_ENT,  KC_HOME, KC_PGDN, KC_PGUP, KC_END
+    ),
+
+    [RSE] = LAYOUT(
+        KC_1,    KC_2,    KC_3,    KC_4,    KC_5,                      KC_6,    KC_7,    KC_8,    KC_9,    KC_0   ,
+        KC_GRV,  _______, _______, _______, _______,                   KC_MINS, KC_EQL,  _______, KC_LBRC, KC_RBRC,
+        _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, KC_QUOT, KC_BSLS,
+        _______, _______, _______, _______, KC_DEL,  _______, _______, KC_ENT,  KC_HOME, KC_PGDN, KC_PGUP, KC_END
+    ),
+    [FUN] = LAYOUT(
+        KC_F1,   KC_F2,   KC_F3,   KC_F4,   KC_F5,                     KC_F6,   KC_F7,   KC_F8,   KC_F9,   KC_F10 ,
+        KC_F11,  KC_F12,  KC_F13,  KC_F14,  KC_F15,                    _______, KC_WH_L, KC_WH_D, KC_WH_U, KC_WH_R,
+        _______, _______, _______, _______, _______, RESET,   EEP_RST, _______, _______, KC_BTN1, KC_BTN2, KC_BTN3,
+        _______, _______, _______, _______, _______, _______, _______, _______, KC_MS_L, KC_MS_D, KC_MS_U, KC_MS_R
+    )
+};
diff --git a/users/dshields/dshields.c b/users/dshields/dshields.c
index 8f432a317c4..13eab12d4a9 100644
--- a/users/dshields/dshields.c
+++ b/users/dshields/dshields.c
@@ -2,6 +2,11 @@
 #include "dshields.h"
 
 bool process_record_user(uint16_t keycode, keyrecord_t *record) {
+    if ((keycode >= QK_MOD_TAP && keycode <= QK_MOD_TAP_MAX)
+            || (keycode >= QK_LAYER_TAP && keycode <= QK_LAYER_TAP_MAX)
+            || (keycode >= QK_MODS && keycode <= QK_MODS_MAX)) {
+        keycode = keycode & 0xFF;
+    }
     if (keycode == KC_ESC && record->event.pressed) {
         bool rc = true;
         uint8_t mods = 0;
diff --git a/users/dshields/dshields.h b/users/dshields/dshields.h
index e1aa07a5db5..54268210c9a 100644
--- a/users/dshields/dshields.h
+++ b/users/dshields/dshields.h
@@ -15,6 +15,8 @@
 
 // mod-tap keys
 #define MT_SPC  SFT_T(KC_SPC)
+#define MT_BSPC SFT_T(KC_BSPC)
+#define MT_ESC  LGUI_T(KC_ESC)
 
 // LED/RGB controls
 #ifdef KEYBOARD_planck_light