diff --git a/source/GridMap.gd b/source/GridMap.gd
index 26c2945..8a8674e 100644
--- a/source/GridMap.gd
+++ b/source/GridMap.gd
@@ -36,6 +36,8 @@ func possible_positions(initial_translations, movement):
 		position = initial_translations[i] + movement
 		if is_free_cell(position):
 			test_translations.append(position)
+		else:
+			break
 	if test_translations.size() == Tetromino.NB_MINOES:
 		return test_translations
 	else: