diff --git a/c/reg_test/input/Makefile.in b/c/reg_test/input/Makefile.in
index 13d757a79..e17ad26e3 100644
--- a/c/reg_test/input/Makefile.in
+++ b/c/reg_test/input/Makefile.in
@@ -452,6 +452,7 @@ EXTRA_DIST = \
 		quote-original.csv \
 		regex.dkvp \
 		regularize.dkvp \
+		remove-empty-columns.csv \
 		repeat-input.dat \
 		repeats.dkvp \
 		reshape-long-ragged.dkvp \