diff --git a/bin/df/df.c b/bin/df/df.c
index f865b8f1eeee..7870412951bd 100644
--- a/bin/df/df.c
+++ b/bin/df/df.c
@@ -290,6 +290,7 @@ main(int argc, char *argv[])
 			prtstat(&mntbuf[i], &maxwidths);
 	if (cflag)
 		prtstat(&totalbuf, &maxwidths);
+	free(mntbuf);
 	return (rv);
 }