diff --git a/Lib/lib2to3/fixes/fix_next.py b/Lib/lib2to3/fixes/fix_next.py
index adbc962..6b54376 100644
--- a/Lib/lib2to3/fixes/fix_next.py
+++ b/Lib/lib2to3/fixes/fix_next.py
@@ -47,12 +47,12 @@
         mod = results.get("mod")
 
         if base:
-          if self.shadowed_next:
-              attr.replace(Name("__next__", prefix=attr.get_prefix()))
-          else:
-              base = [n.clone() for n in base]
-              base[0].set_prefix("")
-              node.replace(Call(Name("next", prefix=node.get_prefix()), base))
+            if self.shadowed_next:
+                attr.replace(Name("__next__", prefix=attr.get_prefix()))
+            else:
+                base = [n.clone() for n in base]
+                base[0].set_prefix("")
+                node.replace(Call(Name("next", prefix=node.get_prefix()), base))
         elif name:
             n = Name("__next__", prefix=name.get_prefix())
             name.replace(n)