diff --git a/xpp/core/interpreter.py b/xpp/core/interpreter.py
index 1b6a797..8e81103 100644
--- a/xpp/core/interpreter.py
+++ b/xpp/core/interpreter.py
@@ -21,7 +21,7 @@ def __init__(self, args: list, mem: Memory) -> None:
 # Interpreter class
 class Interpreter(object):
     def __init__(self, entrypoint: str, sections: list, **kwargs) -> None:
-        self.entrypoint = entrypoint.replace("\\", "/").split("/")[-1].removesuffix(".xpp")
+        self.entrypoint = entrypoint.split(os.sep)[-1].removesuffix(".xpp")
         self.sections = sections
 
         self.stack, self.memory = [], Memory(**{"interpreter": self} | kwargs)
diff --git a/xpp/core/sections.py b/xpp/core/sections.py
index a4cd938..c497996 100644
--- a/xpp/core/sections.py
+++ b/xpp/core/sections.py
@@ -56,8 +56,7 @@ def load_sections(source: str, filepath: str, namespace: str = None) -> list:
     """
 
     # Calculate file name
-    filepath = filepath.replace("\\", "/")
-    filename = namespace or filepath.split("/")[-1].removesuffix(".xpp")
+    filename = namespace or filepath.split(os.sep)[-1].removesuffix(".xpp")
 
     # Initialization
     data = {"sections": [{"sid": f"{filename}.main", "path": filepath, "lines": [], "start": 1, "args": []}], "active": 0}