diff --git a/src/go/printer/nodes.go b/src/go/printer/nodes.go
index 0a693b6667..a4651e0608 100644
--- a/src/go/printer/nodes.go
+++ b/src/go/printer/nodes.go
@@ -1739,7 +1739,7 @@ func (p *printer) genDecl(d *ast.GenDecl) {
 	p.setPos(d.Pos())
 	p.print(d.Tok, blank)
 
-	if d.Lparen.IsValid() || len(d.Specs) > 1 {
+	if d.Lparen.IsValid() || len(d.Specs) != 1 {
 		// group of parenthesized declarations
 		p.setPos(d.Lparen)
 		p.print(token.LPAREN)
diff --git a/src/go/printer/printer_test.go b/src/go/printer/printer_test.go
index 8e78bc640e..6d5b559e50 100644
--- a/src/go/printer/printer_test.go
+++ b/src/go/printer/printer_test.go
@@ -848,3 +848,18 @@ func TestSourcePosNewline(t *testing.T) {
 		t.Errorf("unexpected Fprint output:\n%s", buf.Bytes())
 	}
 }
+
+// TestEmptyDecl tests that empty decls for const, var, import are printed with
+// valid syntax e.g "var ()" instead of just "var", which is invalid and cannot
+// be parsed.
+func TestEmptyDecl(t *testing.T) { // issue 63566
+	for _, tok := range []token.Token{token.IMPORT, token.CONST, token.TYPE, token.VAR} {
+		var buf bytes.Buffer
+		Fprint(&buf, token.NewFileSet(), &ast.GenDecl{Tok: tok})
+		got := buf.String()
+		want := tok.String() + " ()"
+		if got != want {
+			t.Errorf("got %q, want %q", got, want)
+		}
+	}
+}