diff --git a/Python/pythonrun.c b/Python/pythonrun.c
--- a/Python/pythonrun.c
+++ b/Python/pythonrun.c
@@ -1385,7 +1385,7 @@
 {
     PyObject *m, *d, *v;
     const char *ext;
-    int set_file_name = 0, ret;
+    int set_file_name = 0, ret, closeown = 0;
     size_t len;
 
     m = PyImport_AddModule("__main__");
@@ -1419,6 +1419,7 @@
             ret = -1;
             goto done;
         }
+        closeown = 1;
         /* Turn on optimization if a .pyo file is given */
         if (strcmp(ext, ".pyo") == 0)
             Py_OptimizeFlag = 1;
@@ -1449,6 +1450,8 @@
     Py_DECREF(v);
     ret = 0;
   done:
+    if (closeown)
+        fclose(fp);
     if (set_file_name && PyDict_DelItemString(d, "__file__"))
         PyErr_Clear();
     return ret;