Index: uspace/lib/c/generic/ddi.c
===================================================================
--- uspace/lib/c/generic/ddi.c	(revision 9727b92a69662ad809160b46263b1ef1fa3a6f92)
+++ uspace/lib/c/generic/ddi.c	(revision e5e2d733644a28922ccdf2939328e7cbd0dcfbb4)
@@ -153,4 +153,6 @@
 		return iospace_enable(task_get_id(), pio_addr, size);
 	}
+#else
+	(void) iospace_enable;
 #endif
 	if (!virt)