diff --git a/softoff/Makefile.am b/softoff/Makefile.am
index 66501a5..aafce74 100644
--- a/softoff/Makefile.am
+++ b/softoff/Makefile.am
@@ -4,6 +4,7 @@
 
 phosphor_softpoweroff_SOURCES = \
                     softoff.cpp \
+                    timer.cpp   \
                     mainapp.cpp \
                     xyz/openbmc_project/Ipmi/Internal/SoftPowerOff/server.cpp