diff --git a/UPGRADE.txt b/UPGRADE.txt
index e2196b5e71..81f1a5b59c 100755
--- a/UPGRADE.txt
+++ b/UPGRADE.txt
@@ -148,5 +148,5 @@ chan_modem:
 
 * All the chan_modem channel drivers (aopen, bestdata and i4l) are deprecated
   in this release, and will be removed in the next major Asterisk release.
-  Please migrate to chan_mISDN for ISDN interfaces; there is no upgrade
+  Please migrate to chan_misdn for ISDN interfaces; there is no upgrade
   path for aopen and bestdata modem users.