diff --git a/gdb/python/py-block.c b/gdb/python/py-block.c
index 280dbad8b04..50f1ab3fb83 100644
--- a/gdb/python/py-block.c
+++ b/gdb/python/py-block.c
@@ -147,8 +147,7 @@ PyObject* DictIter_iternext(PyObject *self)
 }
 
 static PyTypeObject DictIterType = {
-PyObject_HEAD_INIT(NULL)
-0,                         /*ob_size*/
+PyVarObject_HEAD_INIT (NULL, 0)
 "gdb._DictIter",            /*tp_name*/
 sizeof(DictIter),       /*tp_basicsize*/
 0,                         /*tp_itemsize*/
@@ -174,8 +173,7 @@ Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_ITER,
 0,  /* tp_richcompare */
 0,  /* tp_weaklistoffset */
 DictIter_iter,  /* tp_iter: __iter__() method */
-DictIter_iternext  /* tp_iternext: next() method */,
-.tp_new = PyType_GenericNew
+DictIter_iternext  /* tp_iternext: next() method */
 };                                                                                                                                                                 
 
 static PyObject *
@@ -538,6 +536,7 @@ gdbpy_initialize_blocks (void)
   if (PyType_Ready (&block_syms_iterator_object_type) < 0)
     return -1;
 
+  DictIterType.tp_new = PyType_GenericNew;
   if (PyType_Ready(&DictIterType) < 0)  return -1;
   /* Register an objfile "free" callback so we can properly
      invalidate blocks when an object file is about to be
diff --git a/gdb/python/py-minsymbol.c b/gdb/python/py-minsymbol.c
index d98c9933e38..ac4f06cf485 100644
--- a/gdb/python/py-minsymbol.c
+++ b/gdb/python/py-minsymbol.c
@@ -319,6 +319,9 @@ gdbpy_lookup_minimal_symbol (PyObject *self, PyObject *args, PyObject *kw)
   static char *keywords[] = { "name", "sfile", "objfile", NULL };
   struct bound_minimal_symbol bound_minsym = {};
   PyObject *msym_obj = NULL, *sfile_obj = NULL, *objfile_obj = NULL;
+#if PY_MAJOR_VERSION >= 3
+  PyObject *temp = NULL;
+#endif
 
   if (!PyArg_ParseTupleAndKeywords (args, kw, "s|OO", keywords, &name,
 				    &sfile_obj, &objfile_obj))
@@ -326,16 +329,33 @@ gdbpy_lookup_minimal_symbol (PyObject *self, PyObject *args, PyObject *kw)
 
   if (sfile_obj && sfile_obj != Py_None)
     {
-      sfile = PyString_AsString (sfile_obj);
-      if (!sfile)
-	return NULL;
+#if PY_MAJOR_VERSION >= 3
+	  temp = PyUnicode_AsASCIIString(sfile_obj);
+	  if (!temp)
+		  return NULL;
+
+      sfile = PyBytes_AsString(temp); 
+#else
+	  sfile = PyString_AsString(sfile_obj);
+#endif
+
+      if (!sfile) {
+#if PY_MAJOR_VERSION >= 3
+		Py_DECREF(temp); 
+#endif
+		return NULL;
+	  }
     }
 
   if (objfile_obj && objfile_obj != Py_None)
     {
       objfile = objfpy_object_to_objfile (objfile_obj);
-      if (!objfile)
-	return NULL;
+      if (!objfile) {
+#if PY_MAJOR_VERSION >= 3
+		Py_DECREF(temp);
+#endif
+		return NULL;
+	  }
     }
 
   TRY
@@ -348,6 +368,10 @@ gdbpy_lookup_minimal_symbol (PyObject *self, PyObject *args, PyObject *kw)
     }
   END_CATCH
 
+#if PY_MAJOR_VERSION >= 3
+  Py_XDECREF(temp);
+#endif
+
   if (bound_minsym.minsym)
       msym_obj = bound_minsym_to_minsym_object (&bound_minsym);
 
diff --git a/gdb/python/py-register.c b/gdb/python/py-register.c
index c2dc62418cf..8281fd7bf0d 100644
--- a/gdb/python/py-register.c
+++ b/gdb/python/py-register.c
@@ -205,6 +205,7 @@ register_set_value(PyObject *self, PyObject *value_obj, void *closure)
 	      ret = write_register (regcache, obj->regnum, &ul_value);
 	    }
 	}
+#if PY_MAJOR_VERSION < 3
       else if (PyInt_Check (value_obj))
 	{
 	  ul_value = PyInt_AsUnsignedLongMask (value_obj);
@@ -216,6 +217,7 @@ register_set_value(PyObject *self, PyObject *value_obj, void *closure)
 	      ret = write_register (regcache, obj->regnum, &ul_value);
 	    }
 	}
+#endif
       else
 	{
 	  value = value_object_to_value(value_obj);
diff --git a/gdb/python/py-target.c b/gdb/python/py-target.c
index d0cd109dcf4..fae872b2777 100644
--- a/gdb/python/py-target.c
+++ b/gdb/python/py-target.c
@@ -748,10 +748,11 @@ enum target_names {
 static PyObject *
 tgt_py_get_name (PyObject *self, void * arg)
 {
-  enum target_names target_string = (enum target_names) (unsigned long)arg;
+  enum target_names target_string = (enum target_names) (intptr_t)arg;
   pytarget_object *target_obj = (pytarget_object *) self;
   struct target_ops *ops = target_obj->ops;
 
+
   PyObject *name;
 
   const char *shortname;
@@ -789,7 +790,7 @@ tgt_py_get_name (PyObject *self, void * arg)
 static int
 tgt_py_set_name (PyObject *self, PyObject *newvalue, void * arg)
 {
-  enum target_names target_string = (enum target_names)(unsigned long) arg;
+  enum target_names target_string = (enum target_names) (intptr_t)arg;
   pytarget_object *target_obj = (pytarget_object *) self;
   struct target_ops *ops = target_obj->ops;
   char *name = NULL;