diff --git a/src/Blocks/BlockDoor.h b/src/Blocks/BlockDoor.h
index 334519077..53f84b553 100644
--- a/src/Blocks/BlockDoor.h
+++ b/src/Blocks/BlockDoor.h
@@ -117,7 +117,8 @@ public:
 	static bool CanBeOn(BLOCKTYPE a_BlockType)
 	{
 		// Vanilla refuses to place doors on transparent blocks
-		return !cBlockInfo::IsTransparent(a_BlockType);
+		// We need to keep the door compatible with itself, otherwise the top half drops while the bottom half stays
+		return !cBlockInfo::IsTransparent(a_BlockType) || IsDoorBlockType(a_BlockType);
 	}
 
 
diff --git a/src/Items/ItemDoor.h b/src/Items/ItemDoor.h
index dbba26728..dacf286e5 100644
--- a/src/Items/ItemDoor.h
+++ b/src/Items/ItemDoor.h
@@ -27,7 +27,7 @@ public:
 	) override
 	{
 		// Vanilla only allows door placement while clicking on the top face of the block below the door:
-		if (a_BlockFace != BLOCK_FACE_NONE)
+		if (a_BlockFace != BLOCK_FACE_TOP)
 		{
 			return false;
 		}
@@ -40,7 +40,7 @@ public:
 		}
 
 		// The door needs a compatible block below it:
-		if ((a_BlockY > 0) && cBlockDoorHandler::CanBeOn(a_World.GetBlock(a_BlockX, a_BlockY - 1, a_BlockZ)))
+		if ((a_BlockY > 0) && !cBlockDoorHandler::CanBeOn(a_World.GetBlock(a_BlockX, a_BlockY - 1, a_BlockZ)))
 		{
 			return false;
 		}