diff --git a/xschem_library/examples/test_backannotated_subckt.sch b/xschem_library/examples/test_backannotated_subckt.sch
index 83a8ff82..5e92aa0b 100644
--- a/xschem_library/examples/test_backannotated_subckt.sch
+++ b/xschem_library/examples/test_backannotated_subckt.sch
@@ -74,7 +74,7 @@ if \{ [info commands calc_rc] eq \{\} \} \{
     proc calc_rc \{ L W \} \{
      if \{[catch \{expr 1200*$L/$W\} res]\} \{set res -1\}
      if \{[catch \{expr 1e-3*$W*$L\} cap]\} \{set cap -1\}
-     return \"Res=$res Cap=$cap\"
+     return \\"Res=$res Cap=$cap\\"
     \}
     puts [info body calc_rc]
     puts \{############\}