diff --git a/docs/Lua API.rst b/docs/Lua API.rst
index bbcf0b145..55a217757 100644
--- a/docs/Lua API.rst	
+++ b/docs/Lua API.rst	
@@ -4587,35 +4587,40 @@ on DF world events.
 List of events
 --------------
 
-1. ``onReactionComplete(reaction,reaction_product,unit,input_items,input_reagents,output_items,call_native)``
+1. ``onReactionCompleting(reaction,reaction_product,unit,input_items,input_reagents,output_items,call_native)``
 
-   Auto activates if detects reactions starting with ``LUA_HOOK_``. Is called when reaction finishes.
+   Is called once per reaction product, before reaction had a chance to call native code for item creation.
+   Setting ``call_native.value=false`` cancels further processing: no items are created and ``onReactionComplete`` is not called.
 
-2. ``onItemContaminateWound(item,unit,wound,number1,number2)``
+2. ``onReactionComplete(reaction,reaction_product,unit,input_items,input_reagents,output_items)``
+
+   Is called once per reaction product, when reaction finishes and has at least one product.
+
+3. ``onItemContaminateWound(item,unit,wound,number1,number2)``
 
    Is called when item tries to contaminate wound (e.g. stuck in).
 
-3. ``onProjItemCheckMovement(projectile)``
+4. ``onProjItemCheckMovement(projectile)``
 
    Is called when projectile moves.
 
-4. ``onProjItemCheckImpact(projectile,somebool)``
+5. ``onProjItemCheckImpact(projectile,somebool)``
 
    Is called when projectile hits something.
 
-5. ``onProjUnitCheckMovement(projectile)``
+6. ``onProjUnitCheckMovement(projectile)``
 
    Is called when projectile moves.
 
-6. ``onProjUnitCheckImpact(projectile,somebool)``
+7. ``onProjUnitCheckImpact(projectile,somebool)``
 
    Is called when projectile hits something.
 
-7. ``onWorkshopFillSidebarMenu(workshop,callnative)``
+8. ``onWorkshopFillSidebarMenu(workshop,callnative)``
 
    Is called when viewing a workshop in 'q' mode, to populate reactions, useful for custom viewscreens for shops.
 
-8. ``postWorkshopFillSidebarMenu(workshop)``
+9. ``postWorkshopFillSidebarMenu(workshop)``
 
    Is called after calling (or not) native fillSidebarMenu(). Useful for job button
    tweaking (e.g. adding custom reactions)
@@ -4683,7 +4688,7 @@ Functions
 
 1. ``registerReaction(reaction_name,callback)``
 
-   Simplified way of using onReactionComplete; the callback is function (same params as event).
+   Simplified way of using onReactionCompleting; the callback is function (same params as event).
 
 2. ``removeNative(shop_name)``
 
@@ -4715,7 +4720,7 @@ Reaction complete example::
 
   b=require "plugins.eventful"
 
-  b.registerReaction("LUA_HOOK_LAY_BOMB",function(reaction,unit,in_items,in_reag,out_items,call_native)
+  b.registerReaction("LAY_BOMB",function(reaction,unit,in_items,in_reag,out_items,call_native)
     local pos=copyall(unit.pos)
     -- spawn dragonbreath after 100 ticks
     dfhack.timeout(100,"ticks",function() dfhack.maps.spawnFlow(pos,6,0,0,50000) end)
diff --git a/docs/changelog.txt b/docs/changelog.txt
index 4c034b5bc..1302cf82e 100644
--- a/docs/changelog.txt
+++ b/docs/changelog.txt
@@ -40,6 +40,7 @@ changelog.txt uses a syntax similar to RST, with a few special sequences:
 ## Fixes
 - ``widgets.CycleHotkeyLabel``: allow initial option values to be specified as an index instead of an option value
 - ``job.removeJob()``: fixes regression in DFHack 0.47.05-r5 where items/buildings associated with the job were not getting disassociated when the job is removed. Now `build-now` can build buildings and `gui/mass-remove` can cancel building deconstruction again
+- `eventful`: fix ``eventful.registerReaction`` to correctly pass ``call_native`` argument thus allowing canceling vanilla item creation. Updated related documentation.
 
 ## Misc Improvements
 - `confirm`: added a confirmation dialog for removing manager orders
diff --git a/plugins/lua/eventful.lua b/plugins/lua/eventful.lua
index 293874393..b1520dac1 100644
--- a/plugins/lua/eventful.lua
+++ b/plugins/lua/eventful.lua
@@ -93,7 +93,7 @@ end
 function registerReaction(reaction_name,callback)
     _registeredStuff.reactionCallbacks=_registeredStuff.reactionCallbacks or {}
     _registeredStuff.reactionCallbacks[reaction_name]=callback
-    onReactionComplete._library=onReact
+    onReactionCompleting._library=onReact
     dfhack.onStateChange.eventful=unregall
 end