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-rw-r--r--src/ec/google/chromeec/acpi/battery.asl2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/ec/google/chromeec/acpi/battery.asl b/src/ec/google/chromeec/acpi/battery.asl
index d8056b03b2..0a0caec279 100644
--- a/src/ec/google/chromeec/acpi/battery.asl
+++ b/src/ec/google/chromeec/acpi/battery.asl
@@ -17,7 +17,7 @@
// Scope (EC0)
/* Mutex for EC battery index interface */
-Mutex (BATM, 1)
+Mutex (BATM, 0)
// Wait for desired battery index to be presented in shared memory
// Arg0 = battery index