diff --git a/gio/tests/Makefile.am b/gio/tests/Makefile.am
index 270faf63f..2c54e5951 100644
--- a/gio/tests/Makefile.am
+++ b/gio/tests/Makefile.am
@@ -435,6 +435,7 @@ gdbus_threading_SOURCES                  = $(gdbus_sessionbus_sources) gdbus-thr
 gmenumodel_SOURCES                       = $(gdbus_sessionbus_sources) gmenumodel.c
 gnotification_SOURCES                    = $(gdbus_sessionbus_sources) gnotification.c gnotification-server.h gnotification-server.c
 
+BUILT_SOURCES += gdbus-test-codegen-generated.c gdbus-test-codegen-generated.h
 gdbus-test-codegen.o: gdbus-test-codegen-generated.h
 gdbus-test-codegen-generated.h: test-codegen.xml Makefile $(top_builddir)/gio/gdbus-2.0/codegen/gdbus-codegen
 	$(AM_V_GEN) UNINSTALLED_GLIB_SRCDIR=$(top_srcdir) \