diff --git a/include/acpi/acinterp.h b/include/acpi/acinterp.h
index 73967c8..4409830 100644
--- a/include/acpi/acinterp.h
+++ b/include/acpi/acinterp.h
@@ -446,14 +446,10 @@
 /*
  * exutils - interpreter/scanner utilities
  */
-void acpi_ex_enter_interpreter(void);
+acpi_status acpi_ex_enter_interpreter(void);
 
 void acpi_ex_exit_interpreter(void);
 
-void acpi_ex_reacquire_interpreter(void);
-
-void acpi_ex_relinquish_interpreter(void);
-
 void acpi_ex_truncate_for32bit_table(union acpi_operand_object *obj_desc);
 
 u8 acpi_ex_acquire_global_lock(u32 rule);