diff --git a/nml/actions/action0properties.py b/nml/actions/action0properties.py
index 8779e3f..3cf251f 100644
--- a/nml/actions/action0properties.py
+++ b/nml/actions/action0properties.py
@@ -751,7 +751,7 @@ def industry_prod_multiplier(value):
             props.append(Action0Property(0x12 + i, val, 1))
         return props
     else:
-        return [ByteListProp(0x27, [value.values])]
+        return [ByteListProp(0x27, [[i.reduce_constant().value for i in value.values]])]
 
 class RandomSoundsProp(BaseAction0Property):
     def __init__(self, sound_list):