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diff --git a/doc/doc-txt/ChangeLog b/doc/doc-txt/ChangeLog
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@@ -40,6 +40,14 @@ JH/09 Fix macro-definition during "-be" expansion testing. The move to
write-protected store for macros had not accounted for these runtime
additions; fix by removing this protection for "-be" mode.
+JH/10 Convert all uses of select() to poll(). FreeBSD 12.2 was found to be
+ handing out large-numbered file descriptors, violating the usual Unix
+ assumption (and required by Posix) that the lowest possible number will be
+ allocated by the kernel when a new one is needed. In the daemon, and any
+ child procesees, values higher than 1024 (being bigger than FD_SETSIZE)
+ are not useable for FD_SET() [and hence select()] and overwrite the stack.
+ Assorted crashes happen.
+
Exim version 4.95
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