Added the const qualifier to char* variables that refer to readonly internal
UTF-8 represenatation of Unicode objects.
diff --git a/Modules/_sqlite/statement.c b/Modules/_sqlite/statement.c
index 0df661b..8b45a03 100644
--- a/Modules/_sqlite/statement.c
+++ b/Modules/_sqlite/statement.c
@@ -112,7 +112,7 @@
 int pysqlite_statement_bind_parameter(pysqlite_Statement* self, int pos, PyObject* parameter)
 {
     int rc = SQLITE_OK;
-    char* string;
+    const char *string;
     Py_ssize_t buflen;
     parameter_type paramtype;