diff --git a/Makefile b/Makefile
index 5b447d4f73..23dc52c1d9 100644
--- a/Makefile
+++ b/Makefile
@@ -287,7 +287,7 @@ LIB_H = \
 	run-command.h strbuf.h tag.h tree.h git-compat-util.h revision.h \
 	tree-walk.h log-tree.h dir.h path-list.h unpack-trees.h builtin.h \
 	utf8.h reflog-walk.h patch-ids.h attr.h decorate.h progress.h \
-	mailmap.h remote.h
+	mailmap.h remote.h transport.h
 
 DIFF_OBJS = \
 	diff.o diff-lib.o diffcore-break.o diffcore-order.o \