diff --git a/power-sequencer/Makefile.am b/power-sequencer/Makefile.am
index 9309999..485ae3e 100644
--- a/power-sequencer/Makefile.am
+++ b/power-sequencer/Makefile.am
@@ -6,6 +6,7 @@
 
 witherspoon_pseq_monitor_SOURCES = \
 	argument.cpp \
+	gpio.cpp \
 	main.cpp \
 	pgood_monitor.cpp \
 	ucd90160.cpp \