diff --git a/tools/ghidra_scripts/lego_util/type_importer.py b/tools/ghidra_scripts/lego_util/type_importer.py
index 0c413e4a..0d3ee5df 100644
--- a/tools/ghidra_scripts/lego_util/type_importer.py
+++ b/tools/ghidra_scripts/lego_util/type_importer.py
@@ -153,7 +153,7 @@ def _import_union(self, type_pdb: dict[str, Any]) -> DataType:
             union_type = get_ghidra_type(self.api, type_pdb["name"])
             assert (
                 union_type.getLength() == type_pdb["size"]
-            ), f"Wrong size of existing union type '{type_pdb['name']}': expected {type_pdb["size"]}, got {union_type.getLength()}"
+            ), f"Wrong size of existing union type '{type_pdb['name']}': expected {type_pdb['size']}, got {union_type.getLength()}"
             return union_type
         except TypeNotFoundInGhidraError as e:
             # We have so few instances, it is not worth implementing this