diff --git a/python/src/com/jetbrains/python/psi/impl/PyBuiltinCache.java b/python/src/com/jetbrains/python/psi/impl/PyBuiltinCache.java
index 64382fa698dd..b545290c13c6 100644
--- a/python/src/com/jetbrains/python/psi/impl/PyBuiltinCache.java
+++ b/python/src/com/jetbrains/python/psi/impl/PyBuiltinCache.java
@@ -172,7 +172,7 @@ public class PyBuiltinCache {
   }
 
   public boolean isValid() {
-    return myBuiltinsFile == null || myBuiltinsFile.isValid();
+    return myBuiltinsFile != null && myBuiltinsFile.isValid();
   }
 
   /**