diff --git a/src/source/TetrisLogic.cpp b/src/source/TetrisLogic.cpp
index 01cd786..2987180 100644
--- a/src/source/TetrisLogic.cpp
+++ b/src/source/TetrisLogic.cpp
@@ -665,6 +665,11 @@ int DeleteLines()
     }
 
     ApplyLineClearResult(clearedLines);
+    if (currentMode == MODE_CLASSIC && clearedLines > 0)
+    {
+        ApplyBoardGravity();
+    }
+
     if (currentScreen == SCREEN_UPGRADE)
     {
         QueueLineClearEffect(clearedRows, clearedRowCount, clearedLines);