diff --git a/test/Makefile.sources b/test/Makefile.sources
index 084e53343..d962a57fb 100644
--- a/test/Makefile.sources
+++ b/test/Makefile.sources
@@ -236,6 +236,7 @@ test_sources = \
 	operator-source.c				\
 	operator-www.c				\
 	outline-tolerance.c				\
+	overflow.c                                      \
 	over-above-source.c				\
 	over-around-source.c				\
 	over-below-source.c				\