diff --git a/keyboards/coseyfannitutti/mysterium/keymaps/ansi_7u/keymap.c b/keyboards/coseyfannitutti/mysterium/keymaps/ansi_7u/keymap.c
index 35487eee551..71f357681e4 100644
--- a/keyboards/coseyfannitutti/mysterium/keymaps/ansi_7u/keymap.c
+++ b/keyboards/coseyfannitutti/mysterium/keymaps/ansi_7u/keymap.c
@@ -17,7 +17,7 @@
 
 const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
   [0] = LAYOUT_tkl_ansi_7u(
-      KC_GESC,          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_PSCR,  KC_SLCK, KC_PAUS,
+      KC_ESC,          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_PSCR,  KC_SLCK, KC_PAUS,
       KC_GRV,  KC_1,    KC_2,    KC_3,    KC_4,   KC_5,   KC_6,   KC_7,   KC_8,   KC_9,    KC_0,    KC_MINS,  KC_EQL,  KC_BSPC,  KC_INS,   KC_HOME, KC_PGUP,
       KC_TAB,  KC_Q,    KC_W,    KC_E,    KC_R,   KC_T,   KC_Y,   KC_U,   KC_I,   KC_O,    KC_P,    KC_LBRC,  KC_RBRC, KC_BSLS,  KC_DEL,   KC_END,  KC_PGDN,
       KC_CAPS, KC_A,    KC_S,    KC_D,    KC_F,   KC_G,   KC_H,   KC_J,   KC_K,   KC_L,    KC_SCLN, KC_QUOT,  KC_ENT,
diff --git a/keyboards/coseyfannitutti/mysterium/keymaps/default/keymap.c b/keyboards/coseyfannitutti/mysterium/keymaps/default/keymap.c
index b9df25f347e..e8091abbbca 100644
--- a/keyboards/coseyfannitutti/mysterium/keymaps/default/keymap.c
+++ b/keyboards/coseyfannitutti/mysterium/keymaps/default/keymap.c
@@ -17,7 +17,7 @@
 
 const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
   [0] = LAYOUT_tkl_ansi(
-      KC_GESC,          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_PSCR,  KC_SLCK, KC_PAUS,
+      KC_ESC,          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_PSCR,  KC_SLCK, KC_PAUS,
       KC_GRV,  KC_1,    KC_2,    KC_3,    KC_4,   KC_5,   KC_6,   KC_7,   KC_8,   KC_9,    KC_0,    KC_MINS,  KC_EQL,  KC_BSPC,  KC_INS,   KC_HOME, KC_PGUP,
       KC_TAB,  KC_Q,    KC_W,    KC_E,    KC_R,   KC_T,   KC_Y,   KC_U,   KC_I,   KC_O,    KC_P,    KC_LBRC,  KC_RBRC, KC_BSLS,  KC_DEL,   KC_END,  KC_PGDN,
       KC_CAPS, KC_A,    KC_S,    KC_D,    KC_F,   KC_G,   KC_H,   KC_J,   KC_K,   KC_L,    KC_SCLN, KC_QUOT,  KC_ENT,
diff --git a/keyboards/coseyfannitutti/mysterium/keymaps/iso/keymap.c b/keyboards/coseyfannitutti/mysterium/keymaps/iso/keymap.c
index bad4dc2f42e..9467b63c3f0 100644
--- a/keyboards/coseyfannitutti/mysterium/keymaps/iso/keymap.c
+++ b/keyboards/coseyfannitutti/mysterium/keymaps/iso/keymap.c
@@ -17,7 +17,7 @@
 
 const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
   [0] = LAYOUT_tkl_iso(
-      KC_GESC,          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_PSCR,  KC_SLCK, KC_PAUS,
+      KC_ESC,          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_PSCR,  KC_SLCK, KC_PAUS,
       KC_GRV,  KC_1,    KC_2,    KC_3,    KC_4,   KC_5,   KC_6,   KC_7,   KC_8,   KC_9,    KC_0,    KC_MINS,  KC_EQL,  KC_BSPC,  KC_INS,   KC_HOME, KC_PGUP,
       KC_TAB,  KC_Q,    KC_W,    KC_E,    KC_R,   KC_T,   KC_Y,   KC_U,   KC_I,   KC_O,    KC_P,    KC_LBRC,  KC_RBRC,           KC_DEL,   KC_END,  KC_PGDN,
       KC_CAPS, KC_A,    KC_S,    KC_D,    KC_F,   KC_G,   KC_H,   KC_J,   KC_K,   KC_L,    KC_SCLN, KC_QUOT,  KC_NUHS, KC_ENT,
diff --git a/keyboards/coseyfannitutti/mysterium/keymaps/via/keymap.c b/keyboards/coseyfannitutti/mysterium/keymaps/via/keymap.c
index f7baaea8fc2..a44b0158dfa 100644
--- a/keyboards/coseyfannitutti/mysterium/keymaps/via/keymap.c
+++ b/keyboards/coseyfannitutti/mysterium/keymaps/via/keymap.c
@@ -17,7 +17,7 @@
 
 const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
   [0] = LAYOUT_tkl_iso(
-      KC_GESC,          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_PSCR,  KC_SLCK, KC_PAUS,
+      KC_ESC,          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_PSCR,  KC_SLCK, KC_PAUS,
       KC_GRV,  KC_1,    KC_2,    KC_3,    KC_4,   KC_5,   KC_6,   KC_7,   KC_8,   KC_9,    KC_0,    KC_MINS,  KC_EQL,  KC_BSPC,  KC_INS,   KC_HOME, KC_PGUP,
       KC_TAB,  KC_Q,    KC_W,    KC_E,    KC_R,   KC_T,   KC_Y,   KC_U,   KC_I,   KC_O,    KC_P,    KC_LBRC,  KC_RBRC,           KC_DEL,   KC_END,  KC_PGDN,
       KC_CAPS, KC_A,    KC_S,    KC_D,    KC_F,   KC_G,   KC_H,   KC_J,   KC_K,   KC_L,    KC_SCLN, KC_QUOT,  KC_ENT, KC_BSLS,
diff --git a/keyboards/coseyfannitutti/mysterium/mysterium.h b/keyboards/coseyfannitutti/mysterium/mysterium.h
index b705f04c0d4..aa2e2b18da0 100644
--- a/keyboards/coseyfannitutti/mysterium/mysterium.h
+++ b/keyboards/coseyfannitutti/mysterium/mysterium.h
@@ -58,16 +58,16 @@
     K00,      K02, K03, K04, K05, K06, K07, K08, K09,      K0B, K0C, K0D, K0E, K0F, K0G, K0H, \
     K10, K11, K12, K13, K14, K15, K16, K17, K18, K19, K1A, K1B, K1C, K1D,      K1F, K1G, K1H, \
     K20, K21, K22, K23, K24, K25, K26, K27, K28, K29, K2A, K2B, K2C,           K2F, K2G, K2H, \
-    K30, K31, K32, K33, K34, K35, K36, K37, K38, K39, K3A, K3B, K3D, K2D,                     \
+    K30, K31, K32, K33, K34, K35, K36, K37, K38, K39, K3A, K3B, K2D, K3D,                     \
     K40, K01, K41, K42, K43, K44, K45, K46, K47, K48, K49, K4A,      K4D,           K4G,      \
     K50, K51, K52,                K56,           K59, K5A,      K5C,      K5E, K5F, K5G, K5H  \
 ) \
 { \
-    { K00, K01, K02, K03, K04, K05, K06, K07, K08, K09, _x_, K0B, K0C, K0D, K0E, K0F, K0G, K0H }, \
+    { K00, _x_, K02, K03, K04, K05, K06, K07, K08, K09, _x_, K0B, K0C, K0D, K0E, K0F, K0G, K0H }, \
     { K10, K11, K12, K13, K14, K15, K16, K17, K18, K19, K1A, K1B, K1C, K1D, _x_, K1F, K1G, K1H }, \
     { K20, K21, K22, K23, K24, K25, K26, K27, K28, K29, K2A, K2B, K2C, K2D, _x_, K2F, K2G, K2H }, \
     { K30, K31, K32, K33, K34, K35, K36, K37, K38, K39, K3A, K3B, _x_, K3D, _x_, _x_, _x_, _x_ }, \
-    { K40, K41, K42, K43, K44, K45, K46, K47, K48, K49, K4A, _x_, _x_, K4D, _x_, _x_, K4G, _x_ }, \
+    { K40, K41, K42, K43, K44, K45, K46, K47, K48, K49, K4A, K01, _x_, K4D, _x_, _x_, K4G, _x_ }, \
     { K50, K51, K52, _x_, _x_, _x_, K56, _x_, _x_, K59, K5A, _x_, K5C, _x_, K5E, K5F, K5G, K5H }  \
 }
 
@@ -80,10 +80,10 @@
     K50, K51, K52,                K56,                K5A,      K5C,      K5E, K5F, K5G, K5H  \
 ) \
 { \
-    { K00, K01, K02, K03, K04, K05, K06, K07, K08, K09, _x_, K0B, K0C, K0D, K0E, K0F, K0G, K0H }, \
+    { K00, _x_, K02, K03, K04, K05, K06, K07, K08, K09, _x_, K0B, K0C, K0D, K0E, K0F, K0G, K0H }, \
     { K10, K11, K12, K13, K14, K15, K16, K17, K18, K19, K1A, K1B, K1C, K1D, _x_, K1F, K1G, K1H }, \
     { K20, K21, K22, K23, K24, K25, K26, K27, K28, K29, K2A, K2B, K2C, K2D, _x_, K2F, K2G, K2H }, \
     { K30, K31, K32, K33, K34, K35, K36, K37, K38, K39, K3A, K3B, _x_, K3D, _x_, _x_, _x_, _x_ }, \
-    { K40, K41, K42, K43, K44, K45, K46, K47, K48, K49, K4A, _x_, _x_, K4D, _x_, _x_, K4G, _x_ }, \
+    { K40, K41, K42, K43, K44, K45, K46, K47, K48, K49, K4A, K01, _x_, K4D, _x_, _x_, K4G, _x_ }, \
     { K50, K51, K52, _x_, _x_, _x_, K56, _x_, _x_, _x_, K5A, _x_, K5C, _x_, K5E, K5F, K5G, K5H }  \
 }