diff --git a/common/acpi.c b/common/acpi.c
index e12c4e2d18..904c6fe055 100644
--- a/common/acpi.c
+++ b/common/acpi.c
@@ -20,14 +20,18 @@
 #define CPRINTF(format, args...) cprintf(CC_LPC, format, ## args)
 #define CPRINTS(format, args...) cprints(CC_LPC, format, ## args)
 
-static uint8_t acpi_cmd;         /* Last received ACPI command */
-static uint8_t acpi_addr;        /* First byte of data after ACPI command */
-static int acpi_data_count;      /* Number of data writes after command */
-static uint8_t acpi_mem_test;    /* Test byte in ACPI memory space */
+/* Last received ACPI command */
+static uint8_t __bss_slow acpi_cmd;
+/* First byte of data after ACPI command */
+static uint8_t __bss_slow acpi_addr;
+/* Number of data writes after command */
+static int __bss_slow acpi_data_count;
+/* Test byte in ACPI memory space */
+static uint8_t __bss_slow acpi_mem_test;
 
 #ifdef CONFIG_TEMP_SENSOR
-static int dptf_temp_sensor_id;			/* last sensor ID written */
-static int dptf_temp_threshold;			/* last threshold written */
+static int __bss_slow dptf_temp_sensor_id;	/* last sensor ID written */
+static int __bss_slow dptf_temp_threshold;	/* last threshold written */
 #endif
 
 /*