diff --git a/src/lib9/fmt/fmtnull.c b/src/lib9/fmt/fmtnull.c
index a2f808ee..aa5124a5 100644
--- a/src/lib9/fmt/fmtnull.c
+++ b/src/lib9/fmt/fmtnull.c
@@ -21,7 +21,7 @@ __fmtnullflush(Fmt *f)
 int
 fmtnullinit(Fmt *f)
 {
-	memset(&f, 0, sizeof *f);
+	memset(f, 0, sizeof *f);
 	f->runes = 1;
 	f->start = nullbuf;
 	f->to = nullbuf;