diff --git a/Makefile.in b/Makefile.in
index 73b36a3e9..d50cdd0c6 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -120,6 +120,7 @@ DISTFILES_INC = $(INFOS) .gitignore Artistic COPYING COPYING.LESSER \
 	test_*/.*ignore test_*/Makefile* test_*/*.cpp \
 	test_*/*.pl test_*/*.v test_*/*.vc test_*/*.vh \
 	test_verilated/vgen*.pl \
+	test_regress/t/tsub/*.v* \
 	test_regress/t/*.cpp \
 	test_regress/t/*.h \
 	test_regress/t/*.dat \