diff --git a/docs/docs/language-features.md b/docs/docs/language-features.md
index 196be18..474e004 100644
--- a/docs/docs/language-features.md
+++ b/docs/docs/language-features.md
@@ -167,6 +167,9 @@ class Maths {
 print(Maths.sum(10, 5)); # Output: 15
 ```
 
+!!! note "Own property access"
+    Currently, there is no way to access properties from the class from within its own functions (like `self` (python) or `this` (javascript))
+
 ## Enums
 
 Enums can be created using `enum`:
diff --git a/eryx/runtime/environment.py b/eryx/runtime/environment.py
index dd85922..3503c31 100644
--- a/eryx/runtime/environment.py
+++ b/eryx/runtime/environment.py
@@ -51,9 +51,8 @@ def declare_variable(
     ) -> RuntimeValue:
         """Declare a variable in the current scope."""
         # Raise an exception if the variable is already declared
-        if variable_name in self.variables:
-            if not overwrite:
-                raise RuntimeError(f'Variable "{variable_name}" already declared')
+        if variable_name in self.variables and not overwrite:
+            raise RuntimeError(f'Variable "{variable_name}" already declared')
 
         self.variables[variable_name] = value
 
diff --git a/eryx/runtime/interpreter.py b/eryx/runtime/interpreter.py
index 9fcae9e..94d2178 100644
--- a/eryx/runtime/interpreter.py
+++ b/eryx/runtime/interpreter.py
@@ -98,10 +98,13 @@ def eval_class_declaration(
             )
 
         if isinstance(method, FunctionDeclaration):
+            env = Environment(
+                parent_env=environment, disable_file_io=environment.disable_file_io
+            )
             func = FunctionValue(
                 name=method.name,
                 arguments=method.arguments,
-                environment=environment,
+                environment=env,
                 body=method.body,
             )
             class_obj.methods[method.name] = func
@@ -468,7 +471,7 @@ def eval_member_expression(
     member: MemberExpression, environment: Environment
 ) -> RuntimeValue:
     """Evaluate a member expression."""
-    object_value = evaluate(member.object, environment)
+    object_value = evaluate(member.object, environment)  # if ur reading this, you are silly :3
 
     if isinstance(object_value, (ObjectValue, ClassValue, EnumValue)):
         if member.computed: