diff --git a/src/Makefile.am b/src/Makefile.am
index 2cf04b09..c22a568a 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -23,6 +23,7 @@ bin_PROGRAMS = tar
 noinst_HEADERS = arith.h common.h tar.h
 tar_SOURCES = \
  buffer.c\
+ checkpoint.c\
  compare.c\
  create.c\
  delete.c\