diff --git a/src/boot/hardwaremain.c b/src/boot/hardwaremain.c
index 9a3adf7c5d..6545183f5f 100644
--- a/src/boot/hardwaremain.c
+++ b/src/boot/hardwaremain.c
@@ -52,7 +52,9 @@ it with the version available from LANL.
 void hardwaremain(int boot_complete)
 {
 	struct lb_memory *lb_mem;
+#if HAVE_ACPI_RESUME == 1
 	void *wake_vec;
+#endif
 
 	post_code(0x80);