diff --git a/Lib/lib2to3/fixes/fix_import.py b/Lib/lib2to3/fixes/fix_import.py
index 259ddc8..1fa465c 100644
--- a/Lib/lib2to3/fixes/fix_import.py
+++ b/Lib/lib2to3/fixes/fix_import.py
@@ -45,7 +45,7 @@
             node.changed()
         else:
             new = FromImport('.', getattr(imp, 'content', None) or [imp])
-            new.prefix = node.get_prefix()
+            new.set_prefix(node.get_prefix())
             node = new
         return node
 
diff --git a/Lib/lib2to3/tests/test_fixers.py b/Lib/lib2to3/tests/test_fixers.py
index eccbfc0..f5aaa8d 100755
--- a/Lib/lib2to3/tests/test_fixers.py
+++ b/Lib/lib2to3/tests/test_fixers.py
@@ -3319,6 +3319,17 @@
         a = "from . import foo.bar as bang"
         self.check_both(b, a)
 
+    def test_prefix(self):
+        b = """
+        # prefix
+        import foo.bar
+        """
+        a = """
+        # prefix
+        from . import foo.bar
+        """
+        self.check_both(b, a)
+
 
 if __name__ == "__main__":
     import __main__