diff --git a/docs/Lua API.rst b/docs/Lua API.rst
index e017e0a8c..24887cd58 100644
--- a/docs/Lua API.rst	
+++ b/docs/Lua API.rst	
@@ -1132,7 +1132,7 @@ Job module
   Does basic sanity checks to verify if the suggested item type matches
   the flags in the job item.
 
-* ``dfhack.job.isSuitableMaterial(job_item, mat_type, mat_index)``
+* ``dfhack.job.isSuitableMaterial(job_item, mat_type, mat_index, item_type)``
 
   Likewise, if replacing material.
 
diff --git a/docs/changelog.txt b/docs/changelog.txt
index 79179ce5e..ac2e6b55f 100644
--- a/docs/changelog.txt
+++ b/docs/changelog.txt
@@ -50,6 +50,7 @@ changelog.txt uses a syntax similar to RST, with a few special sequences:
 
 ## API
 - `buildingplan`: added Lua interface API
+- `job-module`: add item type param to dfhack.job.isSuitableMaterial() so the non_economic flag can be properly handled (it was being matched for all item types instead of just boulders)
 
 # 0.47.04-r3