diff --git a/drivers/acpi/internal.h b/drivers/acpi/internal.h
index 82444a4cbf15b81a5186b3bba1594e04bd8b94c2..3a7cc297c63d436abf040feb5bee97f9a1841bc9 100644
--- a/drivers/acpi/internal.h
+++ b/drivers/acpi/internal.h
@@ -265,6 +265,10 @@ void acpi_init_lpit(void);
 #else
 static inline void acpi_init_lpit(void) { }
 #endif
+#ifdef CONFIG_ACPI_HMAT
 void hmat_restore_target(int nid);
+#else
+static inline void hmat_restore_target(int nid) {}
+#endif
 
 #endif /* _ACPI_INTERNAL_H_ */