diff --git a/lib/libc/Versions.def b/lib/libc/Versions.def
--- a/lib/libc/Versions.def
+++ b/lib/libc/Versions.def
@@ -35,6 +35,7 @@
 FBSD_1.6 {
 } FBSD_1.5;
 
+# This version was first added to 14.0-current.
 FBSD_1.7 {
 } FBSD_1.6;