diff --git a/lua_dump.py b/lua_dump.py
index d2f2eb2..530e3c3 100644
--- a/lua_dump.py
+++ b/lua_dump.py
@@ -35,7 +35,7 @@ def _escape_string(x):
             yield r'\"'
         elif char == 0x5c:
             yield r'\\'
-        elif 0x7f > char > 0x19:
+        elif 0x7f > char > 0x1f:
             yield chr(char)
         else:
             yield '\\' + str(char).zfill(3)