diff --git a/jedi/_compatibility.py b/jedi/_compatibility.py
index 162c9589..70a67e30 100644
--- a/jedi/_compatibility.py
+++ b/jedi/_compatibility.py
@@ -48,18 +48,3 @@ def pickle_dump(data, file, protocol):
         if sys.platform == 'win32':
             raise IOError(errno.EPIPE, "Broken pipe")
         raise
-
-
-class GeneralizedPopen(subprocess.Popen):
-    def __init__(self, *args, **kwargs):
-        if os.name == 'nt':
-            try:
-                # Was introduced in Python 3.7.
-                CREATE_NO_WINDOW = subprocess.CREATE_NO_WINDOW
-            except AttributeError:
-                CREATE_NO_WINDOW = 0x08000000
-            kwargs['creationflags'] = CREATE_NO_WINDOW
-        # The child process doesn't need file descriptors except 0, 1, 2.
-        # This is unix only.
-        kwargs['close_fds'] = 'posix' in sys.builtin_module_names
-        super(GeneralizedPopen, self).__init__(*args, **kwargs)
diff --git a/jedi/inference/compiled/subprocess/__init__.py b/jedi/inference/compiled/subprocess/__init__.py
index 22f13e79..cad01e06 100644
--- a/jedi/inference/compiled/subprocess/__init__.py
+++ b/jedi/inference/compiled/subprocess/__init__.py
@@ -18,8 +18,7 @@ import weakref
 from functools import partial
 from threading import Thread
 
-from jedi._compatibility import \
-    pickle_dump, pickle_load, GeneralizedPopen
+from jedi._compatibility import pickle_dump, pickle_load
 from jedi import debug
 from jedi.cache import memoize_method
 from jedi.inference.compiled.subprocess import functions
@@ -32,6 +31,21 @@ _MAIN_PATH = os.path.join(os.path.dirname(__file__), '__main__.py')
 PICKLE_PROTOCOL = 4
 
 
+class _GeneralizedPopen(subprocess.Popen):
+    def __init__(self, *args, **kwargs):
+        if os.name == 'nt':
+            try:
+                # Was introduced in Python 3.7.
+                CREATE_NO_WINDOW = subprocess.CREATE_NO_WINDOW
+            except AttributeError:
+                CREATE_NO_WINDOW = 0x08000000
+            kwargs['creationflags'] = CREATE_NO_WINDOW
+        # The child process doesn't need file descriptors except 0, 1, 2.
+        # This is unix only.
+        kwargs['close_fds'] = 'posix' in sys.builtin_module_names
+        super().__init__(*args, **kwargs)
+
+
 def _enqueue_output(out, queue_):
     for line in iter(out.readline, b''):
         queue_.put(line)
@@ -187,7 +201,7 @@ class CompiledSubprocess(object):
             os.path.dirname(os.path.dirname(parso_path)),
             '.'.join(str(x) for x in sys.version_info[:3]),
         )
-        process = GeneralizedPopen(
+        process = _GeneralizedPopen(
             args,
             stdin=subprocess.PIPE,
             stdout=subprocess.PIPE,