diff --git a/include/tdi/common/tdi_defs.h b/include/tdi/common/tdi_defs.h
index 5b7bf74..bed7557 100644
--- a/include/tdi/common/tdi_defs.h
+++ b/include/tdi/common/tdi_defs.h
@@ -359,7 +359,9 @@ typedef uint32_t tdi_dev_pipe_t;
  * @param[out] err_str Pointer to error string. Doesn't require user to allocate
  *space
  */
-// void tdi_err_str(tdi_status_t sts, const char **err_str);
+void tdi_get_err_str(tdi_status_t sts, const char **err_str) {
+	*err_str = tdi_err_str(sts);
+}
 
 #ifdef __cplusplus
 }
diff --git a/tdi_python/tdicli.py b/tdi_python/tdicli.py
index 329d7fe..ff31f5c 100644
--- a/tdi_python/tdicli.py
+++ b/tdi_python/tdicli.py
@@ -256,7 +256,7 @@ def _abort_transaction(self):
 
     def err_str(self, sts):
         estr = c_char_p()
-        self._driver.bf_rt_err_str(c_int(sts), byref(estr))
+        self._driver.tdi_get_err_str(c_int(sts), byref(estr))
         return estr.value.decode('ascii')
     class TdiHandle(Structure):
         _fields_ = [("unused", c_int)]