diff --git a/pipimport/__init__.py b/pipimport/__init__.py
index 1b6c2e6..585ac94 100644
--- a/pipimport/__init__.py
+++ b/pipimport/__init__.py
@@ -97,14 +97,14 @@ def saveignore(self):
 
 
 def install():
-    if isinstance(__builtin__.__import__, ImportPipInstaller):
+    if isinstance(__builtin__import__, ImportPipInstaller):
         return
     importreplacement = ImportPipInstaller()
-    __builtin__.__import__ = importreplacement
+    __builtin__import__ = importreplacement
 
 
 @atexit.register
 def uninstall():
-    if isinstance(__builtin__.__import__, ImportPipInstaller):
+    if isinstance(__builtin__import__, ImportPipInstaller):
         __import__.saveignore()
-        __builtin__.__import__ = __import__.realimport
+        __builtin__import__ = __import__.realimport