diff --git a/libavcodec/vc1.c b/libavcodec/vc1.c
index 229c885060..3c391c678a 100644
--- a/libavcodec/vc1.c
+++ b/libavcodec/vc1.c
@@ -310,7 +310,6 @@ static int bitplane_decoding(uint8_t* data, int *raw_flag, VC1Context *v)
 
 /** @} */ //Bitplane group
 
-#define FILTSIGN(a) ((a) >= 0 ? 1 : -1)
 /**
  * VC-1 in-loop deblocking filter for one line
  * @param src source block type