diff --git a/src/ifcopenshell-python/ifcopenshell/util/unit.py b/src/ifcopenshell-python/ifcopenshell/util/unit.py
index 1d770a06df..0d49c2f654 100644
--- a/src/ifcopenshell-python/ifcopenshell/util/unit.py
+++ b/src/ifcopenshell-python/ifcopenshell/util/unit.py
@@ -649,7 +649,7 @@ def get_base_type_name(
     return None
 
 
-def convert_file_units(ifc_file: ifcopenshell.file, target_units: str) -> ifcopenshell.file:
+def convert_file_length_units(ifc_file: ifcopenshell.file, target_units: str) -> ifcopenshell.file:
     """Converts all units in an IFC file to the specified target units. Returns a new file."""
     prefix = "MILLI" if target_units == "MILLIMETERS" else None
 
diff --git a/src/ifcpatch/ifcpatch/recipes/ConvertLengthUnit.py b/src/ifcpatch/ifcpatch/recipes/ConvertLengthUnit.py
index 4aa8ee45a4..48da1e1b37 100644
--- a/src/ifcpatch/ifcpatch/recipes/ConvertLengthUnit.py
+++ b/src/ifcpatch/ifcpatch/recipes/ConvertLengthUnit.py
@@ -51,4 +51,4 @@ class Patcher:
         self.file_patched: ifcopenshell.file = None
 
     def patch(self):
-        self.file_patched = ifcopenshell.util.unit.convert_file_units(self.file, self.unit)
+        self.file_patched = ifcopenshell.util.unit.convert_file_length_units(self.file, self.unit)