diff --git a/psycopg/cursor_type.c b/psycopg/cursor_type.c
index 0c48bbf5..341f2759 100644
--- a/psycopg/cursor_type.c
+++ b/psycopg/cursor_type.c
@@ -904,7 +904,8 @@ _psyco_curs_has_write_check(PyObject* o, void* var)
         return 1;
     }
     else {
-        PyErr_SetString(TypeError, "argument 1 must have a .write() method");
+        PyErr_SetString(PyExc_TypeError,
+                        "argument 1 must have a .write() method");
         return 0;
     }   
 }
diff --git a/psycopg/pqpath.c b/psycopg/pqpath.c
index 54f9c4b2..89e2e2b3 100644
--- a/psycopg/pqpath.c
+++ b/psycopg/pqpath.c
@@ -538,7 +538,7 @@ _pq_fetch_tuples(cursorObject *curs)
         /* 4,5/ scale and precision */
         if (ftype == NUMERICOID) {
             PyTuple_SET_ITEM(dtitem, 4, PyInt_FromLong((fmod >> 16) & 0xFFFF));
-            PyTuple_SET_ITEM(dtitem, 5, PyInt_FromLong(fmod & 0xFFFF) - 4);
+            PyTuple_SET_ITEM(dtitem, 5, PyInt_FromLong((fmod & 0xFFFF) - 4));
         }
         else {
             Py_INCREF(Py_None);