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-rw-r--r--lib/vsprintf.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/vsprintf.c b/lib/vsprintf.c
index 797428afd11..bed7229378f 100644
--- a/lib/vsprintf.c
+++ b/lib/vsprintf.c
@@ -489,7 +489,7 @@ int vsnprintf(char *buf, size_t size, const char *fmt, va_list args)
if (str < end)
*str = '\0';
else
- *end = '\0';
+ end[-1] = '\0';
}
/* the trailing null byte doesn't count towards the total */
return str-buf;