diff --git a/industry/economies/vanilla_subarctic.py b/industry/economies/vanilla_subarctic.py
index 163db7e0..a684eb17 100644
--- a/industry/economies/vanilla_subarctic.py
+++ b/industry/economies/vanilla_subarctic.py
@@ -108,7 +108,7 @@ def get_economy(self, parameters):
             ret.graph[printing_works].produces += (engineering_supplies,)
             ret.graph[oil_refinery].produces += (farm_supplies,)
 
-        if parameters["WORKFORCE"].startswith("YETI"):
+        if parameters["WORKFORCE"].startswith("YETI") and parameters["WORKER_PARTICIPATION"] != "NONE":
             ret.graph[worker_yard] = WorkerYard(workers, boosters=(goods, gold))
             if parameters["WORKFORCE"] == "YETI":
                 ret.graph[worker_yard] = WorkerYard(workers, boosters=(goods, gold))
@@ -118,10 +118,14 @@ def get_economy(self, parameters):
                 ret.graph[worker_yard] = WorkerYard(workers, boosters=(goods, gold, mail))
             elif parameters["WORKFORCE"] == "YETI_TIRED":
                 ret.graph[worker_yard] = WorkerYard(workers, boosters=(goods, gold, tired_workers))
-                ret.graph[coal_mine].produces += (tired_workers,)
 
             # FIXME
             ret.graph[coal_mine].boosters = workers
+            if parameters["WORKER_PARTICIPATION"] == "PRIMARY_INDUSTRY":
+                for i in [coal_mine, oil_wells, gold_mine, farm, forest]:
+                    ret.graph[i] = ret.graph[i].to_secondary(workers)
+                    if parameters["WORKFORCE"] == "YETI_TIRED":
+                        ret.graph[i].produces += (tired_workers,)
 
         if port in ret.graph:
             if parameters["SEA_INDUSTRY"] == "LAND_ONLY":
diff --git a/industry/lib/economy/__init__.py b/industry/lib/economy/__init__.py
index 91d0645f..9acb080c 100644
--- a/industry/lib/economy/__init__.py
+++ b/industry/lib/economy/__init__.py
@@ -48,6 +48,9 @@ def boosters(self):
     def boosters(self, new_boosters):
         self._boosters = make_tuple(new_boosters)
 
+    def to_secondary(self, consumes):
+        return FakePrimaryIndustry(consumes, self.produces, self.extra_accepts, self.boosters)
+
 
 class WorkerYard(PrimaryIndustry):
     def __init__(self, produces=(), extra_accepts=(), boosters=()):
@@ -60,16 +63,23 @@ def __init__(self, boosters=(), produces=(), extra_accepts=()):
 
 
 class SecondaryIndustry(Industry):
-    def __init__(self, consumes=(), produces=()):
+    def __init__(self, consumes=(), produces=(), extra_accepts=(), boosters=()):
         self.consumes = make_tuple(consumes)
         self.produces = make_tuple(produces)
+        self.extra_accepts = make_tuple(extra_accepts)
+        self.boosters = make_tuple(boosters)
 
     def copy(self):
-        return SecondaryIndustry(self.consumes, self.produces)
+        return SecondaryIndustry(self.consumes, self.produces, self.extra_accepts)
 
     @property
     def accepts(self):
-        return self.consumes
+        return self.consumes + self.extra_accepts + self.boosters
+
+
+class FakePrimaryIndustry(SecondaryIndustry):
+    def __init__(self, consumes=(), produces=(), extra_accepts=(), boosters=()):
+        super().__init__(consumes, produces, extra_accepts, boosters)
 
 
 class TertiaryIndustry(Industry):
diff --git a/industry/lib/parameters.py b/industry/lib/parameters.py
index 58482397..b25c4694 100644
--- a/industry/lib/parameters.py
+++ b/industry/lib/parameters.py
@@ -241,7 +241,7 @@
         "SPECIFIC_SUPPLIES",
     ],
 )
-docs_parameter_choices.update_params("WORKFORCE", ["ABSTRACT", "PROFESSIONAL", "YETI"])
+docs_parameter_choices.update_params("WORKFORCE", ["ABSTRACT", "PROFESSIONAL", "YETI_TIRED"])
 docs_parameter_choices.update_params("WORKER_PARTICIPATION", ["NONE", "PRIMARY_INDUSTRY", "SECONDARY_INDUSTRY"])
 docs_parameter_choices.update_params("SEA_INDUSTRY", ["ORGANIC"])
 docs_parameter_choices.update_params("TOWN_GOODS", ["ORGANIC"])
@@ -267,7 +267,7 @@
     "YETI": {
         "POLICY": "AUTARKY",
         "PRIMARY_INDUSTRY_GROWTH": "UNIVERSAL_SUPPLIES",
-        "WORKFORCE": "YETI",
+        "WORKFORCE": "YETI_TIRED",
         "WORKER_PARTICIPATION": "PRIMARY_INDUSTRY",
         "SEA_INDUSTRY": "ORGANIC",
         "TOWN_GOODS": "ORGANIC",