diff --git a/.gitignore b/.gitignore
index 82f9275..aed338c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,6 +3,9 @@ __pycache__/
 *.py[cod]
 *$py.class
 
+# Swap files
+**/*.sw[nop]
+
 # C extensions
 *.so
 
diff --git a/compiler_config/serialiser.py b/compiler_config/serialiser.py
index 87fbc1d..e31ed03 100644
--- a/compiler_config/serialiser.py
+++ b/compiler_config/serialiser.py
@@ -58,7 +58,7 @@ def default(self, obj):
 
             typ = self.serializable_types.get(obj_type)
             if typ is None:
-                raise ValueError(f"Invalid type attempted to be serialized: {obj_type}.")
+                raise ValueError(f"Invalid type attempted to be deserialized: {obj_type}.")
         else:
             typ = _get_type(obj_type)