diff --git a/libavcodec/truemotion2.c b/libavcodec/truemotion2.c
index c7b7ac3d74..1e682a72ca 100644
--- a/libavcodec/truemotion2.c
+++ b/libavcodec/truemotion2.c
@@ -222,8 +222,6 @@ static inline int tm2_read_header(TM2Context *ctx, const uint8_t *buf)
         av_log (ctx->avctx, AV_LOG_ERROR, "Not a TM2 header: 0x%08X\n", magic);
         return -1;
     }
-
-    return buf - obuf;
 }
 
 static int tm2_read_deltas(TM2Context *ctx, int stream_id) {