diff --git a/drivers/ioexpander/pcf8574.c b/drivers/ioexpander/pcf8574.c
index 56baaa7e8a..01d5e9e75a 100644
--- a/drivers/ioexpander/pcf8574.c
+++ b/drivers/ioexpander/pcf8574.c
@@ -776,7 +776,7 @@ static FAR void *pcf8574_attach(FAR struct ioexpander_dev_s *dev,
  *   0 on success, else a negative error code
  *
  ****************************************************************************/
-
+#ifdef CONFIG_PCF8574_INT_ENABLE
 static int pcf8574_detach(FAR struct ioexpander_dev_s *dev, FAR void *handle)
 {
   FAR struct pcf8574_dev_s *priv = (FAR struct pcf8574_dev_s *)dev;
@@ -792,6 +792,7 @@ static int pcf8574_detach(FAR struct ioexpander_dev_s *dev, FAR void *handle)
   cb->cbarg  = NULL;
   return OK;
 }
+#endif
 
 /****************************************************************************
  * Name: pcf8574_int_update