diff --git a/library/ac-dc.lib b/library/ac-dc.lib
index a06ef74b..0b97f0c3 100644
--- a/library/ac-dc.lib
+++ b/library/ac-dc.lib
@@ -22,7 +22,7 @@ X CH5 6 -500 -100 100 R 50 50 1 1 I
 X CH6 7 -500 -200 100 R 50 50 1 1 I
 X CH7 8 -500 -300 100 R 50 50 1 1 I
 X GND 9 0 -600 100 U 50 50 1 1 W
-X REFin/REFout 10 600 0 100 L 50 50 1 1 I
+X REFin/REFout 10 600 0 100 L 50 50 1 1 B
 X COM 11 -500 -400 100 R 50 50 1 1 I
 X A0 12 600 -300 100 L 50 50 1 1 I
 X A1 13 600 -200 100 L 50 50 1 1 I