diff --git a/src/python/importer.py b/src/python/importer.py
index 60b9b35..c54fb49 100644
--- a/src/python/importer.py
+++ b/src/python/importer.py
@@ -67,7 +67,7 @@
 
             override = os.environ.get('M5_OVERRIDE_PY_SOURCE', 'false').lower()
             if override in ('true', 'yes') and  os.path.exists(abspath):
-                src = file(abspath, 'r').read()
+                src = open(abspath, 'r').read()
                 code = compile(src, abspath, 'exec')
 
             if os.path.basename(srcfile) == '__init__.py':
diff --git a/src/python/m5/main.py b/src/python/m5/main.py
index d8c0d92..e4619c0 100644
--- a/src/python/m5/main.py
+++ b/src/python/m5/main.py
@@ -407,7 +407,7 @@
     sys.path = [ os.path.dirname(sys.argv[0]) ] + sys.path
 
     filename = sys.argv[0]
-    filedata = file(filename, 'r').read()
+    filedata = open(filename, 'r').read()
     filecode = compile(filedata, filename, 'exec')
     scope = { '__file__' : filename,
               '__name__' : '__m5_main__' }
diff --git a/src/python/m5/simulate.py b/src/python/m5/simulate.py
index 03cc253..d72dee2 100644
--- a/src/python/m5/simulate.py
+++ b/src/python/m5/simulate.py
@@ -92,7 +92,7 @@
     for obj in root.descendants(): obj.unproxyParams()
 
     if options.dump_config:
-        ini_file = file(os.path.join(options.outdir, options.dump_config), 'w')
+        ini_file = open(os.path.join(options.outdir, options.dump_config), 'w')
         # Print ini sections in sorted order for easier diffing
         for obj in sorted(root.descendants(), key=lambda o: o.path()):
             obj.print_ini(ini_file)
@@ -101,7 +101,8 @@
     if options.json_config:
         try:
             import json
-            json_file = file(os.path.join(options.outdir, options.json_config), 'w')
+            json_file = open(
+                os.path.join(options.outdir, options.json_config), 'w')
             d = root.get_config_as_dict()
             json.dump(d, json_file, indent=4)
             json_file.close()
diff --git a/src/python/m5/util/code_formatter.py b/src/python/m5/util/code_formatter.py
index d48c59b..129fbd0 100644
--- a/src/python/m5/util/code_formatter.py
+++ b/src/python/m5/util/code_formatter.py
@@ -154,7 +154,7 @@
         self._data = []
 
     def write(self, *args):
-        f = file(os.path.join(*args), "w")
+        f = open(os.path.join(*args), "w")
         for data in self._data:
             f.write(data)
         f.close()
diff --git a/src/python/m5/util/grammar.py b/src/python/m5/util/grammar.py
index bb34298..fcd8df2 100644
--- a/src/python/m5/util/grammar.py
+++ b/src/python/m5/util/grammar.py
@@ -115,7 +115,7 @@
     def parse_file(self, f, **kwargs):
         if isinstance(f, basestring):
             source = f
-            f = file(f, 'r')
+            f = open(f, 'r')
         elif isinstance(f, file):
             source = f.name
         else: