diff --git a/Include/pyexpat.h b/Include/pyexpat.h

index 5340ef5..3fc5fa5 100644

--- a/Include/pyexpat.h

+++ b/Include/pyexpat.h

@@ -3,7 +3,7 @@

 /* note: you must import expat.h before importing this module! */

-#define PyExpat_CAPI_MAGIC  "pyexpat.expat_CAPI 1.0"

+#define PyExpat_CAPI_MAGIC  "pyexpat.expat_CAPI 1.1"

 #define PyExpat_CAPSULE_NAME "pyexpat.expat_CAPI"

 struct PyExpat_CAPI 

@@ -43,6 +43,8 @@ struct PyExpat_CAPI

         XML_Parser parser, XML_UnknownEncodingHandler handler,

         void *encodingHandlerData);

     void (*SetUserData)(XML_Parser parser, void *userData);

+    /* might be none for expat < 2.1.0 */

+    int (*SetHashSalt)(XML_Parser parser, unsigned long hash_salt);

     /* always add new stuff to the end! */

 };

diff --git a/Modules/_elementtree.c b/Modules/_elementtree.c

index 379aa01..ce62081 100644

--- a/Modules/_elementtree.c

+++ b/Modules/_elementtree.c

@@ -2500,6 +2500,11 @@ xmlparser(PyObject* self_, PyObject* args, PyObject* kw)

         PyErr_NoMemory();

         return NULL;

     }

+    /* expat < 2.1.0 has no XML_SetHashSalt() */

+    if (EXPAT(SetHashSalt) != NULL) {

+        EXPAT(SetHashSalt)(self->parser,

+                           (unsigned long)_Py_HashSecret.prefix);

+    }

     /* setup target handlers */

     if (!target) {

diff --git a/Modules/pyexpat.c b/Modules/pyexpat.c

index f269113..147b8a9 100644

--- a/Modules/pyexpat.c

+++ b/Modules/pyexpat.c

@@ -2037,6 +2037,11 @@ MODULE_INITFUNC(void)

     capi.SetProcessingInstructionHandler = XML_SetProcessingInstructionHandler;

     capi.SetUnknownEncodingHandler = XML_SetUnknownEncodingHandler;

     capi.SetUserData = XML_SetUserData;

+#if XML_COMBINED_VERSION >= 20100

+    capi.SetHashSalt = XML_SetHashSalt;

+#else

+    capi.SetHashSalt = NULL;

+#endif

     /* export using capsule */

     capi_object = PyCapsule_New(&capi, PyExpat_CAPSULE_NAME, NULL);