diff --git a/syntax/printer.go b/syntax/printer.go
index d11e614..160b051 100644
--- a/syntax/printer.go
+++ b/syntax/printer.go
@@ -1608,7 +1608,7 @@ func (e *extraIndenter) WriteByte(b byte) error {
 		e.bufWriter.WriteByte('\t')
 	}
 	e.bufWriter.WriteByte(tabwriter.Escape)
-	e.bufWriter.Write(trimmed)
+	e.bufWriter.WriteString(string(trimmed))
 	e.curLine = e.curLine[:0]
 	return nil
 }
diff --git a/syntax/printer_test.go b/syntax/printer_test.go
index a3231b0..67a5031 100644
--- a/syntax/printer_test.go
+++ b/syntax/printer_test.go
@@ -548,6 +548,8 @@ var printTests = []printCase{
 	samePrint("f <<EOF\nEOF\n# comment\nbar"),
 	samePrint("f <<EOF # inline\n$(\n\t# inside\n)\nEOF\n# outside\nbar"),
 	samePrint("while foo; do\n\tbar\ndone <<-EOF # inline\n\tbaz\nEOF"),
+	samePrint("foo <<-EOF\n\tpre $(\n\t\tbar <<-INNER\n\t\t\tcontent\n\t\tINNER\n\t)\nEOF"),
+	samePrint("foo <<-EOF\n\tpre $(\n\t\tbar <<-INNER\n\t\t\tline one\n\t\t\tline two\n\t\tINNER\n\t)\nEOF"),
 	samePrint("{\n\tcat <<EOF\nEOF\n\t# comment\n}"),
 	{
 		"if foo # inline\nthen\n\tbar\nfi",