diff --git a/internal/web-plumbing/server.go b/internal/web-plumbing/server.go
index 5f404d6..beaac22 100644
--- a/internal/web-plumbing/server.go
+++ b/internal/web-plumbing/server.go
@@ -352,6 +352,10 @@ func (w webProvider) SubmitMove(mov chesseract.Move) error {
 			return err
 		}
 
+		if piece, ok := g.Match.Board.At(mov.From); ok {
+			mov.PieceType = piece.PieceType
+		}
+
 		newb, err := g.Match.RuleSet.ApplyMove(g.Match.Board, mov)
 		if err != nil {
 			return client.ErrIllegalMove