diff --git a/Makefile.am b/Makefile.am
index cce4f4c..c227281 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -78,6 +78,7 @@
 	pid/util.cpp \
 	pid/pidthread.cpp \
 	threads/busthread.cpp \
+	build/buildjson.cpp \
 	experiments/drive.cpp \
 	$(BUILT_SOURCES)