diff --git a/src/ec/acpi/ec.h b/src/ec/acpi/ec.h
index 5b3467c398..0877fe200b 100644
--- a/src/ec/acpi/ec.h
+++ b/src/ec/acpi/ec.h
@@ -16,6 +16,8 @@
 #ifndef _EC_ACPI_H
 #define _EC_ACPI_H
 
+#include <stdint.h>
+
 #define EC_DATA	0x62
 #define EC_SC	0x66