diff --git a/lib/des/read_pwd.c b/lib/des/read_pwd.c
index 3e63c61bc..ccd8de0d3 100644
--- a/lib/des/read_pwd.c
+++ b/lib/des/read_pwd.c
@@ -7,7 +7,7 @@
 #include <setjmp.h>
 
 /* Ick! */
-#if defined(__svr4__) || defined(_IRIX)
+#if defined(__svr4__) || defined(__sgi)
 #define TERMIO
 #endif