diff --git a/src/cmd/compile/internal/gc/sizeof_test.go b/src/cmd/compile/internal/gc/sizeof_test.go
index 22646552a1..b86188c314 100644
--- a/src/cmd/compile/internal/gc/sizeof_test.go
+++ b/src/cmd/compile/internal/gc/sizeof_test.go
@@ -24,6 +24,7 @@ func TestSizeof(t *testing.T) {
 	}{
 		{Func{}, 92, 160},
 		{Name{}, 44, 72},
+		{Param{}, 24, 48},
 		{Node{}, 92, 144},
 		{Sym{}, 60, 112},
 		{Type{}, 60, 96},