diff --git a/apps/rudolph/Makefile.rudolph b/apps/rudolph/Makefile.rudolph
index 89eedf677..7cccf552c 100644
--- a/apps/rudolph/Makefile.rudolph
+++ b/apps/rudolph/Makefile.rudolph
@@ -1 +1 @@
-APP_SOURCES += rudolph0.c
+APP_SOURCES += rudolph0.c rudolph1.c