diff --git a/src/build/import_hwp_mk/istepmpipl/istepmpiplfiles.mk b/src/build/import_hwp_mk/istepmpipl/istepmpiplfiles.mk
index 84ceb427e..7058dc7b4 100644
--- a/src/build/import_hwp_mk/istepmpipl/istepmpiplfiles.mk
+++ b/src/build/import_hwp_mk/istepmpipl/istepmpiplfiles.mk
@@ -52,6 +52,7 @@ ISTEPMPIPL-CPP-SOURCES +=p9_suspend_io.C
 ISTEPMPIPL-CPP-SOURCES +=p9_perv_sbe_cmn.C
 ISTEPMPIPL-CPP-SOURCES +=p9_suspend_powman.C
 ISTEPMPIPL-CPP-SOURCES +=p9_collect_suspend_ffdc.C
+ISTEPMPIPL-CPP-SOURCES +=p9_eq_clear_atomic_lock.C
 ISTEPMPIPL-C-SOURCES =
 ISTEPMPIPL-S-SOURCES =