diff --git a/MCServer/Plugins/APIDump/APIDesc.lua b/MCServer/Plugins/APIDump/APIDesc.lua
index 3982f8b4c..b4b2e11a3 100644
--- a/MCServer/Plugins/APIDump/APIDesc.lua
+++ b/MCServer/Plugins/APIDump/APIDesc.lua
@@ -2826,6 +2826,44 @@ end;
 			]],
 		},  -- HOOK_PLAYER_PLACED_BLOCK
 
+		HOOK_PLAYER_PLACING_BLOCK =
+		{
+			CalledWhen = "Just before a player places a block. Plugin may override / refuse.",
+			DefaultFnName = "OnPlayerPlacingBlock",  -- also used as pagename
+			Desc = [[
+				This hook is called just before a {{cPlayer|player}} places a block in the {{cWorld|world}}. The
+				block is not yet placed, plugins may choose to override the default behavior or refuse the placement
+				at all.</p>
+				<p>
+				Note that the client already expects that the block has been placed. For that reason, if a plugin
+				refuses the placement, MCServer sends the old block at the provided coords to the client.</p>
+				<p>
+				Use the {{cPlayer}}:GetWorld() function to get the world to which the block belongs.</p>
+				<p>
+				See also the {{OnPlayerPlacedBlock|HOOK_PLAYER_PLACED_BLOCK}} hook for a similar hook called after
+				the placement.
+			]],
+			Params =
+			{
+				{ Name = "Player", Type = "{{cPlayer}}", Notes = "The player who is placing the block" },
+				{ Name = "BlockX", Type = "number", Notes = "X-coord of the block" },
+				{ Name = "BlockY", Type = "number", Notes = "Y-coord of the block" },
+				{ Name = "BlockZ", Type = "number", Notes = "Z-coord of the block" },
+				{ Name = "BlockFace", Type = "number", Notes = "Face of the existing block upon which the player is interacting. One of the BLOCK_FACE_ constants" },
+				{ Name = "CursorX", Type = "number", Notes = "X-coord of the cursor within the block face (0 .. 15)" },
+				{ Name = "CursorY", Type = "number", Notes = "Y-coord of the cursor within the block face (0 .. 15)" },
+				{ Name = "CursorZ", Type = "number", Notes = "Z-coord of the cursor within the block face (0 .. 15)" },
+				{ Name = "BlockType", Type = "BLOCKTYPE", Notes = "The block type of the block" },
+				{ Name = "BlockMeta", Type = "NIBBLETYPE", Notes = "The block meta of the block" },
+			},
+			Returns = [[
+				If this function returns false or no value, MCServer calls other plugins with the same event and
+				finally places the block and removes the corresponding item from player's inventory. If this
+				function returns true, no other plugin is called for this event, MCServer sends the old block at
+				the specified coords to the client and drops the packet.
+			]],
+		},  -- HOOK_PLAYER_PLACING_BLOCK
+
 	},  -- Hooks[]