diff --git a/libavcodec/intrax8.h b/libavcodec/intrax8.h
index 966f1b18a0..9ef2fc3dd3 100644
--- a/libavcodec/intrax8.h
+++ b/libavcodec/intrax8.h
@@ -77,7 +77,6 @@ typedef struct IntraX8Context {
  * Initialize IntraX8 frame decoder.
  * @param avctx pointer to AVCodecContext
  * @param w pointer to IntraX8Context
- * @param idsp pointer to IDCTDSPContext
  * @param block pointer to block array
  * @param block_last_index pointer to index array
  * @param mb_width macroblock width