diff --git a/headers/os/drivers/ACPI.h b/headers/os/drivers/ACPI.h
index 335d914695..32a5341aa6 100644
--- a/headers/os/drivers/ACPI.h
+++ b/headers/os/drivers/ACPI.h
@@ -253,7 +253,7 @@ struct acpi_module_info {
 	status_t	(*reboot)(void);
 
 	/* Table Access */
-	status_t	(*get_table)(char *signature, uint32 instance,
+	status_t	(*get_table)(const char *signature, uint32 instance,
 					void **tableHeader);
 };
 
diff --git a/src/add-ons/kernel/bus_managers/acpi/acpi_busman.c b/src/add-ons/kernel/bus_managers/acpi/acpi_busman.c
index b34cddd159..e3e09d124e 100644
--- a/src/add-ons/kernel/bus_managers/acpi/acpi_busman.c
+++ b/src/add-ons/kernel/bus_managers/acpi/acpi_busman.c
@@ -714,10 +714,10 @@ reboot(void)
 
 
 status_t
-get_table(char* signature, uint32 instance, void** tableHeader)
+get_table(const char* signature, uint32 instance, void** tableHeader)
 {
-	return AcpiGetTable(signature, instance, (ACPI_TABLE_HEADER**)tableHeader)
-		== AE_OK ? B_OK : B_ERROR;
+	return AcpiGetTable((char*)signature, instance,
+		(ACPI_TABLE_HEADER**)tableHeader) == AE_OK ? B_OK : B_ERROR;
 }
 
 
diff --git a/src/add-ons/kernel/bus_managers/acpi/acpi_priv.h b/src/add-ons/kernel/bus_managers/acpi/acpi_priv.h
index 3722229186..a4d4462bc0 100644
--- a/src/add-ons/kernel/bus_managers/acpi/acpi_priv.h
+++ b/src/add-ons/kernel/bus_managers/acpi/acpi_priv.h
@@ -136,7 +136,7 @@ typedef struct acpi_root_info {
 	status_t	(*reboot)(void);
 
 	/* Table Access */
-	status_t	(*get_table)(char *signature, uint32 instance,
+	status_t	(*get_table)(const char *signature, uint32 instance,
 					void **tableHeader);
 } acpi_root_info;
 
@@ -215,7 +215,7 @@ status_t enter_sleep_state(uint8 state);
 
 status_t reboot(void);
 
-status_t get_table(char* signature, uint32 instance, void** tableHeader);
+status_t get_table(const char* signature, uint32 instance, void** tableHeader);
 
 __END_DECLS