diff --git a/Lib/importlib/_bootstrap.py b/Lib/importlib/_bootstrap.py
index f2ef1cf..18ea85c 100644
--- a/Lib/importlib/_bootstrap.py
+++ b/Lib/importlib/_bootstrap.py
@@ -404,6 +404,7 @@
                     else:
                         found = marshal.loads(bytes_data)
                         if isinstance(found, code_type):
+                            imp._fix_co_filename(found, source_path)
                             return found
                         else:
                             msg = "Non-code object in {}"
diff --git a/Misc/NEWS b/Misc/NEWS
index 0dd8a3d..f70998c 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -84,6 +84,10 @@
 Library
 -------
 
+- Issue #6811: Allow importlib to change a code object's co_filename attribute
+  to match the path to where the source code currently is, not where the code
+  object originally came from.
+
 - Issue #8754: Have importlib use the repr of a module name in error messages.
 
 - Issue #11591: Prevent "import site" from modifying sys.path when python
diff --git a/Python/import.c b/Python/import.c
index 907ccd7..b074b83 100644
--- a/Python/import.c
+++ b/Python/import.c
@@ -1374,6 +1374,32 @@
     Py_DECREF(oldname);
 }
 
+static PyObject *
+imp_fix_co_filename(PyObject *self, PyObject *args)
+{
+    PyObject *co;
+    PyObject *file_path;
+
+    if (!PyArg_ParseTuple(args, "OO:_fix_co_filename", &co, &file_path))
+        return NULL;
+
+    if (!PyCode_Check(co)) {
+        PyErr_SetString(PyExc_TypeError,
+                        "first argument must be a code object");
+        return NULL;
+    }
+
+    if (!PyUnicode_Check(file_path)) {
+        PyErr_SetString(PyExc_TypeError,
+                        "second argument must be a string");
+        return NULL;
+    }
+
+    update_compiled_module((PyCodeObject*)co, file_path);
+
+    Py_RETURN_NONE;
+}
+
 /* Load a source module from a given file and return its module
    object WITH INCREMENTED REFERENCE COUNT.  If there's a matching
    byte-compiled file, use that instead. */
@@ -3976,6 +4002,7 @@
 #endif
     {"load_package",            imp_load_package,       METH_VARARGS},
     {"load_source",             imp_load_source,        METH_VARARGS},
+    {"_fix_co_filename",        imp_fix_co_filename,    METH_VARARGS},
     {NULL,                      NULL}           /* sentinel */
 };