diff --git a/fc-lang/ie.orth b/fc-lang/ie.orth
index 19b35a2..a1e2022 100644
--- a/fc-lang/ie.orth
+++ b/fc-lang/ie.orth
@@ -23,7 +23,19 @@
 #
 # Interlingue (IE)
 #
-# Orthography taken from http://www.kolumbus.fi/allkiv/itgr/itgrix.htm
+# Source: http://interlingue.narod.ru/Haas.htm
 #
 0041-005a
 0061-007a
+00c1
+00c9
+00cd
+00d3
+00da
+00dd
+00e1
+00e9
+00ed
+00f3
+00fa
+00fd