diff --git a/lib/output.js b/lib/output.js
index c2f49e9e..2676aa93 100644
--- a/lib/output.js
+++ b/lib/output.js
@@ -1140,6 +1140,7 @@ function OutputStream(options) {
             0x21   , // !
             0x0a   , // \n
             0x0d   , // \r
+            0x00   , // \0
             0xfeff , // Unicode BOM
             0x2028 , // unicode "line separator"
             0x2029 , // unicode "paragraph separator"