diff --git a/keyboards/massdrop/alt/keymaps/abishalom/keymap.c b/keyboards/massdrop/alt/keymaps/abishalom/keymap.c
index f6f79ad91e..a08123b0f5 100644
--- a/keyboards/massdrop/alt/keymaps/abishalom/keymap.c
+++ b/keyboards/massdrop/alt/keymaps/abishalom/keymap.c
@@ -12,8 +12,6 @@ enum alt_keycodes {
 
 #define TG_NKRO MAGIC_TOGGLE_NKRO //Toggle 6KRO / NKRO mode
 
-keymap_config_t keymap_config;
-
 const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
     [0] = LAYOUT(
         KC_ESC,  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_DEL,  \
diff --git a/keyboards/massdrop/alt/keymaps/bonta/keymap.c b/keyboards/massdrop/alt/keymaps/bonta/keymap.c
index c1acf2c151..9ac27f57e3 100644
--- a/keyboards/massdrop/alt/keymaps/bonta/keymap.c
+++ b/keyboards/massdrop/alt/keymaps/bonta/keymap.c
@@ -14,8 +14,6 @@ enum alt_keycodes {
 #define RGB_BRU RGB_VAI
 #define RGB_BRD RGB_VAD
 
-keymap_config_t keymap_config;
-
 const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
     [0] = LAYOUT(
         KC_ESC,  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_DEL,  \
diff --git a/keyboards/massdrop/alt/keymaps/favorable-mutation/keymap.c b/keyboards/massdrop/alt/keymaps/favorable-mutation/keymap.c
index 873d18449b..4c079a6aaf 100644
--- a/keyboards/massdrop/alt/keymaps/favorable-mutation/keymap.c
+++ b/keyboards/massdrop/alt/keymaps/favorable-mutation/keymap.c
@@ -28,8 +28,6 @@ enum alt_keycodes {
 //
 //TODO tap/toggle for layers
 
-keymap_config_t keymap_config;
-
 const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
     [0] = LAYOUT(
         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_SPOT,
diff --git a/keyboards/massdrop/alt/keymaps/reywood/keymap.c b/keyboards/massdrop/alt/keymaps/reywood/keymap.c
index cf60acfe66..6279b509b4 100644
--- a/keyboards/massdrop/alt/keymaps/reywood/keymap.c
+++ b/keyboards/massdrop/alt/keymaps/reywood/keymap.c
@@ -26,8 +26,6 @@ enum alt_keycodes {
 #define TG_NKRO MAGIC_TOGGLE_NKRO //Toggle 6KRO / NKRO mode
 #define ______ KC_TRNS
 
-keymap_config_t keymap_config;
-
 const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
   [0] = LAYOUT(
     KC_ESC,  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_DEL,  \
diff --git a/tmk_core/protocol/arm_atsam/i2c_master.c b/tmk_core/protocol/arm_atsam/i2c_master.c
index d3319ab447..dda2f85b00 100644
--- a/tmk_core/protocol/arm_atsam/i2c_master.c
+++ b/tmk_core/protocol/arm_atsam/i2c_master.c
@@ -28,6 +28,9 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #    define I2C_LED_USE_DMA 1  // Set 1 to use background DMA transfers for leds, Set 0 to use inline software transfers
 
+DmacDescriptor dmac_desc;
+DmacDescriptor dmac_desc_wb;
+
 static uint8_t i2c_led_q[I2C_Q_SIZE];  // I2C queue circular buffer
 static uint8_t i2c_led_q_s;            // Start of circular buffer
 static uint8_t i2c_led_q_e;            // End of circular buffer
diff --git a/tmk_core/protocol/arm_atsam/i2c_master.h b/tmk_core/protocol/arm_atsam/i2c_master.h
index 44dbdfbffa..68773f213f 100644
--- a/tmk_core/protocol/arm_atsam/i2c_master.h
+++ b/tmk_core/protocol/arm_atsam/i2c_master.h
@@ -24,8 +24,8 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #    include "issi3733_driver.h"
 #    include "config.h"
 
-__attribute__((__aligned__(16))) DmacDescriptor dmac_desc;
-__attribute__((__aligned__(16))) DmacDescriptor dmac_desc_wb;
+extern __attribute__((__aligned__(16))) DmacDescriptor dmac_desc;
+extern __attribute__((__aligned__(16))) DmacDescriptor dmac_desc_wb;
 
 uint8_t I2C3733_Init_Control(void);
 uint8_t I2C3733_Init_Drivers(void);