diff --git a/sys/sys/termios.h b/sys/sys/termios.h
index 5f64b869b75..bc071fbf96c 100644
--- a/sys/sys/termios.h
+++ b/sys/sys/termios.h
@@ -234,7 +234,7 @@ struct termios {
 #ifndef _KERNEL
 
 #ifndef _POSIX_SOURCE
-#define	CCEQ(val, c)	((c) != _POSIX_VDISABLE && (c) == (val))
+#define	CCEQ(val, c)	((c) == (val) && (val) != _POSIX_VDISABLE)
 #endif
 
 /*