mathoms.c: Add comment

1 files changed, 4 insertions, 0 deletions

diff --git a/mathoms.c b/mathoms.c
index 8089b79623..752edd8d74 100644
--- a/mathoms.c
+++ b/mathoms.c
@@ -731,6 +731,10 @@ potentially warn under some level of strict-ness.
 "Superseded" by C<sv_nosharing()>.
 
 =cut
+
+PERL_UNLOCK_HOOK in intrpvar.h is the macro that refers to this, and guarantees
+that mathoms gets loaded.
+
 */
 
 void