diff --git a/Makefile b/Makefile
index 1a2d2fcddd..a7be204257 100644
--- a/Makefile
+++ b/Makefile
@@ -171,7 +171,7 @@ $(SOURCE_DIST): $(ERLANG_MK_RECURSIVE_DEPS_LIST)
 	$(gen_verbose) $(RSYNC) $(RSYNC_FLAGS) ./ $@/
 	$(verbose) echo "$(PROJECT_DESCRIPTION) $(PROJECT_VERSION)" > "$@/git-revisions.txt"
 	$(verbose) echo "$(PROJECT) $$(git rev-parse HEAD) $$(git describe --tags --exact-match 2>/dev/null || git symbolic-ref -q --short HEAD)" >> "$@/git-revisions.txt"
-	$(verbose) echo "$$(TZ= git --no-pager log -n 1 --format='%cd' --date='format-local:%Y%m%d%H%M%S')" > "$@.git-times.txt"
+	$(verbose) echo "$$(TZ= git --no-pager log -n 1 --format='%cd' --date='format-local:%Y%m%d%H%M.%S')" > "$@.git-times.txt"
 	$(verbose) cat packaging/common/LICENSE.head > $@/LICENSE
 	$(verbose) mkdir -p $@/deps/licensing
 	$(verbose) set -e; for dep in $$(cat $(ERLANG_MK_RECURSIVE_DEPS_LIST) | LC_COLLATE=C sort); do \