diff --git a/RELEASENOTES-DEVELOPMENT.md b/RELEASENOTES-DEVELOPMENT.md
index 634df2bb..666071a8 100644
--- a/RELEASENOTES-DEVELOPMENT.md
+++ b/RELEASENOTES-DEVELOPMENT.md
@@ -6,6 +6,8 @@ Version 4.1-dev-454-ga774a6fc
 **Bug Fixes**
 * Fix a few compilation bugs and portability issues, and turn off deprecation warnings when compiling for Mac OS.
 
+**Note:** After this update, you'll need to run `autoreconf -fi` and the `./configure...` steps again.
+
 Version 4.1-dev-439-gb7a11cae
 ====
 Documentation update. Comments, corrections and suggestions welcome.