diff --git a/cyrus-imapd.spec b/cyrus-imapd.spec
index 90d2159..116886d 100644
--- a/cyrus-imapd.spec
+++ b/cyrus-imapd.spec
@@ -2,6 +2,7 @@
 
 # Disable passing --as-needed to the linker; it breaks cyrus terribly for
 # reasons I don't understand.
+# https://github.com/cyrusimap/cyrus-imapd/issues/2629
 %undefine _ld_as_needed
 
 # Cassandane commit hash.  Cassandane doesn't have releases often, but it