diff --git a/usr.bin/yacc/skeleton.c b/usr.bin/yacc/skeleton.c
index c1263d9e2872..8ff7c8a122f1 100644
--- a/usr.bin/yacc/skeleton.c
+++ b/usr.bin/yacc/skeleton.c
@@ -335,7 +335,7 @@ const char *body[] =
     "    if (yym)",
     "        yyval = yyvsp[1-yym];",
     "    else",
-    "    memset(&yyval, 0, sizeof yyval);",
+    "        memset(&yyval, 0, sizeof yyval);",
     "    switch (yyn)",
     "    {",
     0