diff --git a/CHANGELOG.md b/CHANGELOG.md
index a5a213ca6f3c81bab0e287e89fc826472b498604..9423f46486f09fbf76d64f4806180910e8ff5235 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,8 @@
 * If the `${LDFLAGS}` environment variable is set in the environment, any
   `-L` options are dropped from it, so that the `$FSLDEVDIR` can explicitly
   be set to take precedence over `$FSLDIR`.
+* `${FSLDEVDIR}` doesn't have to exist - if it is set before
+  `${FSLDIR}/etc/fslconf/fsl-devel.sh` is run, it will not be overridden.
 
 
 ## 2111.8 (Friday 26th November 2021)