Patch #1550800: make exec a function.
diff --git a/Lib/site.py b/Lib/site.py
index 0cf19cd..1513818 100644
--- a/Lib/site.py
+++ b/Lib/site.py
@@ -135,7 +135,7 @@
             if line.startswith("#"):
                 continue
             if line.startswith("import"):
-                exec line
+                exec(line)
                 continue
             line = line.rstrip()
             dir, dircase = makepath(sitedir, line)