diff --git a/net/irda/irda_device.c b/net/irda/irda_device.c
index d6ccd32..70543d8 100644
--- a/net/irda/irda_device.c
+++ b/net/irda/irda_device.c
@@ -470,6 +470,7 @@
 }
 EXPORT_SYMBOL(irda_device_unregister_dongle);
 
+#ifdef CONFIG_ISA_DMA_API
 /*
  * Function setup_dma (idev, buffer, count, mode)
  *
@@ -492,3 +493,4 @@
 	release_dma_lock(flags);
 }
 EXPORT_SYMBOL(irda_setup_dma);
+#endif