1 files changed, 2 insertions, 1 deletions
diff --git a/lib9/vseprint.c b/lib9/vseprint.c
index 6f478960..b9675b35 100644
--- a/lib9/vseprint.c
+++ b/lib9/vseprint.c
@@ -27,8 +27,9 @@ vseprint(char *buf, char *e, char *fmt, va_list args)
 	f.flush = nil;
 	f.farg = nil;
 	f.nfmt = 0;
-	f.args = args;
+	va_copy(f.args, args);
 	dofmt(&f, fmt);
+	va_end(f.args);
 	*(char*)f.to = '\0';
 	return f.to;
 }