diff --git a/src/bin/Makefile.am b/src/bin/Makefile.am
index 59530ff..0a0bc5a 100644
--- a/src/bin/Makefile.am
+++ b/src/bin/Makefile.am
@@ -227,6 +227,11 @@ expedite_SOURCES += \
 engine_wayland_shm.c engine_wayland_shm.h
 endif
 
+if BUILD_DRM
+expedite_SOURCES += \
+engine_drm.c engine_drm.h
+endif
+
 .rc.lo:
 	$(LIBTOOL) $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --tag=RC --mode=compile $(RC) $(RCFLAGS) $< -o $@