diff --git a/changelog.d/0000-transit-terrain-height-cache.md b/changelog.d/1688-transit-terrain-height-cache.md
similarity index 94%
rename from changelog.d/0000-transit-terrain-height-cache.md
rename to changelog.d/1688-transit-terrain-height-cache.md
index f846f015d..27cef4638 100644
--- a/changelog.d/0000-transit-terrain-height-cache.md
+++ b/changelog.d/1688-transit-terrain-height-cache.md
@@ -3,4 +3,4 @@
   terrain for the height of every trail fix of every vehicle in view; heights
   are now kept per point, read again only while the camera moves or tiles
   load, and read within a time budget that puts vehicle positions first
-  (mazy1998).
+  (mazy1998, #1688).