diff --git a/usr.sbin/Makefile b/usr.sbin/Makefile
index 18c7f63ac60..346cb7f887b 100644
--- a/usr.sbin/Makefile
+++ b/usr.sbin/Makefile
@@ -211,6 +211,10 @@ SUBDIR+=i4b
 
 .endif
 
+.if ${MACHINE_ARCH} == "ia64"
+SUBDIR+=acpi
+.endif
+
 # kgmon: builds, but no kernel profiling
 # kgzip: builds, but missing support files
 # mptable: broken (not 64 bit clean)