diff --git a/danmaku2ass.py b/danmaku2ass.py
index 0cf51f4..ef854a2 100755
--- a/danmaku2ass.py
+++ b/danmaku2ass.py
@@ -685,7 +685,7 @@ def export(func):
 
 
 @export
-def Danmaku2ASS(input_files, output_file, stage_width, stage_height, reserve_blank=0, font_face=_('(FONT) sans-serif')[7:], font_size=25.0, text_opaque=1.0, comment_duration=5.0, is_reduce_comments=False, progress_callback=None):
+def Danmaku2ASS(input_files, output_file, stage_width, stage_height, reserve_blank=0, font_face=_('(FONT) sans-serif')[7:], font_size=25.0, text_opacity=1.0, comment_duration=5.0, is_reduce_comments=False, progress_callback=None):
     fo = None
     comments = ReadComments(input_files, font_size)
     try:
@@ -693,7 +693,7 @@ def Danmaku2ASS(input_files, output_file, stage_width, stage_height, reserve_bla
             fo = ConvertToFile(output_file, 'w', encoding='utf-8-sig', errors='replace', newline='\r\n')
         else:
             fo = sys.stdout
-        ProcessComments(comments, fo, stage_width, stage_height, reserve_blank, font_face, font_size, text_opaque, comment_duration, is_reduce_comments, progress_callback)
+        ProcessComments(comments, fo, stage_width, stage_height, reserve_blank, font_face, font_size, text_opacity, comment_duration, is_reduce_comments, progress_callback)
     finally:
         if output_file and fo:
             fo.close()