diff --git a/src/stdio/__scanf.c b/src/stdio/__scanf.c
index 185615d..6e4bd4c 100644
--- a/src/stdio/__scanf.c
+++ b/src/stdio/__scanf.c
@@ -99,8 +99,10 @@ int __scanf(rctx_t *r, const wchar_t *fmt, va_list ap)
 		} else if (*p != '%' || p[1] == '%') {
 			if (*p == '%') p++;
 			r->w = 1;
-			if (*p++ != read(r))
+			if (*p++ != read(r)) {
+				if(r->c == -1) matches = -1;
 				goto match_fail;
+			}
 			continue;
 		}
 		p++;
@@ -126,7 +128,7 @@ int __scanf(rctx_t *r, const wchar_t *fmt, va_list ap)
 		} else if (mode == 1) {
 			dest = va_arg(ap, void *);
 		}
-		
+
 		if (!*p) goto fmt_fail;
 
 		width = 0;
@@ -474,6 +476,7 @@ writefloat:
 		/* unread will do nothing if field width was exhausted */
 		unread(r);
 		if (dest) matches++;
+		else(r->u = 0); //prevent bad size returned with follow-up %n
 	}
 	return matches;
 enc_fail: