1 files changed, 2 insertions, 1 deletions
diff --git a/embed.fnc b/embed.fnc
index 27d63a9ff8..2d2a237273 100644
--- a/embed.fnc
+++ b/embed.fnc
@@ -21,7 +21,8 @@
 :         proto.h: add __attribute__malloc__
 :
 :   b  Binary backward compatibility; function is a macro
-:      but has also Perl_ implementation (which is exported):
+:      but has also Perl_ implementation (which is exported); often
+:      implemented in mathoms.c:
 :
 :         add entry to the list of exported symbols;
 :         don't define PERL_ARGS_ASSERT_FOO