diff --git a/usr.bin/printenv/printenv.1 b/usr.bin/printenv/printenv.1
index 72bacfc776ed..a4d2d9b044a5 100644
--- a/usr.bin/printenv/printenv.1
+++ b/usr.bin/printenv/printenv.1
@@ -62,6 +62,13 @@ is specified and it is not defined in the environment,
 .Nm printenv
 returns exit status 1, else it returns status 0.
 .Pp
+Some shells may provide a builtin
+.Nm
+command which is similar or identical to this utility.
+Consult the
+.Xr builtin 1
+manual page.
+.Pp
 .Nm Env
 executes
 .Ar command