diff --git a/sys/winnt/nttty.c b/sys/winnt/nttty.c
index f09bfdf70..3708440ad 100644
--- a/sys/winnt/nttty.c
+++ b/sys/winnt/nttty.c
@@ -791,7 +791,8 @@ term_start_attr(int attr)
                 break;
         case ATR_INVERSE:
 		/* Suggestion by Lee Berger */
-		if (currentcolor & (FOREGROUND_GREEN|FOREGROUND_BLUE|FOREGROUND_RED))
+		if ((currentcolor & (FOREGROUND_GREEN|FOREGROUND_BLUE|FOREGROUND_RED)) ==
+			(FOREGROUND_GREEN|FOREGROUND_BLUE|FOREGROUND_RED))
 			currentcolor = 0;
 		currentbackground = (BACKGROUND_RED|BACKGROUND_BLUE|BACKGROUND_GREEN);
 		colorchange = TRUE;