diff --git a/compiler/msg/errore.msg b/compiler/msg/errore.msg
index c16f321dc8..d5cbefae19 100644
--- a/compiler/msg/errore.msg
+++ b/compiler/msg/errore.msg
@@ -2236,6 +2236,7 @@ P*1T<x>_Target operating system:
 P*2Tdarwin_Darwin and MacOS X on PowerPC
 P*2Tlinux_Linux on PowerPC
 P*2Tmacos_MacOS (classic) on PowerPC
+P*2Tmorphos_MorphOS
 **1*_
 **1?_shows this help
 **1h_shows this help without waiting