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-rw-r--r--sys/lib/string/vsnprintf.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/sys/lib/string/vsnprintf.c b/sys/lib/string/vsnprintf.c
index a3b7e91..489514f 100644
--- a/sys/lib/string/vsnprintf.c
+++ b/sys/lib/string/vsnprintf.c
@@ -96,6 +96,9 @@ vsnprintf(char *s, size_t size, const char *fmt, va_list ap)
c1 = (char )va_arg(ap, int);
printc(s, size, &off, c1);
break;
+ case '%':
+ printc(s, size, &off, c);
+ break;
case 'd':
num = va_arg(ap, int);
itoa(num, num_buf, 10);