diff --git a/src/board/system76/darp5/acpi.c b/src/board/system76/darp5/acpi.c
index b92aa27..4063b27 100644
--- a/src/board/system76/darp5/acpi.c
+++ b/src/board/system76/darp5/acpi.c
@@ -7,9 +7,11 @@
 
 extern uint8_t sci_extra;
 
-uint8_t fcmd = 0;
-uint8_t fdat = 0;
-uint8_t fbuf[4] = { 0, 0, 0, 0 };
+uint8_t ecos = 0;
+
+static uint8_t fcmd = 0;
+static uint8_t fdat = 0;
+static uint8_t fbuf[4] = { 0, 0, 0, 0 };
 
 void fcommand(void) {
     // TODO
@@ -66,6 +68,8 @@ uint8_t acpi_read(uint8_t addr) {
         ACPI_16(0x2E, battery_remaining_capacity);
         ACPI_16(0x32, battery_voltage);
 
+        ACPI_8(0x68, ecos);
+
         ACPI_8(0xCC, sci_extra);
 
         // Airplane mode LED
@@ -100,6 +104,10 @@ void acpi_write(uint8_t addr, uint8_t data) {
             lid_wake = (bool)(data & (1 << 2));
             break;
 
+        case 0x68:
+            ecos = data;
+            break;
+
         // Airplane mode LED
         case 0xD9:
             gpio_set(&LED_AIRPLANE_N, !(bool)(data & (1 << 6)));
diff --git a/src/board/system76/galp3-c/acpi.c b/src/board/system76/galp3-c/acpi.c
index a5de1d4..2ffb5c9 100644
--- a/src/board/system76/galp3-c/acpi.c
+++ b/src/board/system76/galp3-c/acpi.c
@@ -8,6 +8,8 @@
 
 extern uint8_t sci_extra;
 
+uint8_t ecos = 0;
+
 static uint8_t fcmd = 0;
 static uint8_t fdat = 0;
 static uint8_t fbuf[4] = { 0, 0, 0, 0 };
@@ -81,6 +83,8 @@ uint8_t acpi_read(uint8_t addr) {
         ACPI_16(0x2E, battery_remaining_capacity);
         ACPI_16(0x32, battery_voltage);
 
+        ACPI_8(0x68, ecos);
+
         ACPI_8(0xCC, sci_extra);
 
         // Airplane mode LED
@@ -115,6 +119,10 @@ void acpi_write(uint8_t addr, uint8_t data) {
             lid_wake = (bool)(data & (1 << 2));
             break;
 
+        case 0x68:
+            ecos = data;
+            break;
+
         // Airplane mode LED
         case 0xD9:
             gpio_set(&LED_AIRPLANE_N, !(bool)(data & (1 << 6)));