diff --git a/common/block.go b/common/block.go
index 5e699ee..fce6b99 100644
--- a/common/block.go
+++ b/common/block.go
@@ -160,7 +160,7 @@ func decode29(data []byte, colors *Colors) (*DecodedBlock, error) {
 		return nil, err
 	}
 
-	content, err := dec.DecodeAll(data, nil)
+	content, err := dec.DecodeAll(data[1:], nil)
 	if err != nil {
 		return nil, err
 	}