diff --git a/src/game/collision.cpp b/src/game/collision.cpp
index b640e04c3..a517ba999 100644
--- a/src/game/collision.cpp
+++ b/src/game/collision.cpp
@@ -877,13 +877,13 @@ bool CCollision::TileExistsNext(int Index) const
 		return true;
 	if(m_pTiles[TileOnTheRight].m_Index == TILE_STOPA || m_pTiles[TileOnTheLeft].m_Index == TILE_STOPA || ((m_pTiles[TileOnTheRight].m_Index == TILE_STOPS || m_pTiles[TileOnTheLeft].m_Index == TILE_STOPS)))
 		return true;
-	if(m_pTiles[TileBelow].m_Index == TILE_STOPA || m_pTiles[TileAbove].m_Index == TILE_STOPA || ((m_pTiles[TileBelow].m_Index == TILE_STOPS || m_pTiles[TileAbove].m_Index == TILE_STOPS) && m_pTiles[TileBelow].m_Flags | ROTATION_180 | ROTATION_0))
+	if(m_pTiles[TileBelow].m_Index == TILE_STOPA || m_pTiles[TileAbove].m_Index == TILE_STOPA || (m_pTiles[TileBelow].m_Index == TILE_STOPS || m_pTiles[TileAbove].m_Index == TILE_STOPS))
 		return true;
 	if(m_pFront)
 	{
 		if(m_pFront[TileOnTheRight].m_Index == TILE_STOPA || m_pFront[TileOnTheLeft].m_Index == TILE_STOPA || ((m_pFront[TileOnTheRight].m_Index == TILE_STOPS || m_pFront[TileOnTheLeft].m_Index == TILE_STOPS)))
 			return true;
-		if(m_pFront[TileBelow].m_Index == TILE_STOPA || m_pFront[TileAbove].m_Index == TILE_STOPA || ((m_pFront[TileBelow].m_Index == TILE_STOPS || m_pFront[TileAbove].m_Index == TILE_STOPS) && m_pFront[TileBelow].m_Flags | ROTATION_180 | ROTATION_0))
+		if(m_pFront[TileBelow].m_Index == TILE_STOPA || m_pFront[TileAbove].m_Index == TILE_STOPA || (m_pFront[TileBelow].m_Index == TILE_STOPS || m_pFront[TileAbove].m_Index == TILE_STOPS))
 			return true;
 		if((m_pFront[TileOnTheRight].m_Index == TILE_STOP && m_pFront[TileOnTheRight].m_Flags == ROTATION_270) || (m_pFront[TileOnTheLeft].m_Index == TILE_STOP && m_pFront[TileOnTheLeft].m_Flags == ROTATION_90))
 			return true;
@@ -894,7 +894,7 @@ bool CCollision::TileExistsNext(int Index) const
 	{
 		if(m_pDoor[TileOnTheRight].m_Index == TILE_STOPA || m_pDoor[TileOnTheLeft].m_Index == TILE_STOPA || ((m_pDoor[TileOnTheRight].m_Index == TILE_STOPS || m_pDoor[TileOnTheLeft].m_Index == TILE_STOPS)))
 			return true;
-		if(m_pDoor[TileBelow].m_Index == TILE_STOPA || m_pDoor[TileAbove].m_Index == TILE_STOPA || ((m_pDoor[TileBelow].m_Index == TILE_STOPS || m_pDoor[TileAbove].m_Index == TILE_STOPS) && m_pDoor[TileBelow].m_Flags | ROTATION_180 | ROTATION_0))
+		if(m_pDoor[TileBelow].m_Index == TILE_STOPA || m_pDoor[TileAbove].m_Index == TILE_STOPA || (m_pDoor[TileBelow].m_Index == TILE_STOPS || m_pDoor[TileAbove].m_Index == TILE_STOPS))
 			return true;
 		if((m_pDoor[TileOnTheRight].m_Index == TILE_STOP && m_pDoor[TileOnTheRight].m_Flags == ROTATION_270) || (m_pDoor[TileOnTheLeft].m_Index == TILE_STOP && m_pDoor[TileOnTheLeft].m_Flags == ROTATION_90))
 			return true;