Index: uspace/lib/c/include/ipc/dev_iface.h
===================================================================
--- uspace/lib/c/include/ipc/dev_iface.h	(revision 1b11576d37f42974be6406260fc3bcf888c2e19d)
+++ uspace/lib/c/include/ipc/dev_iface.h	(revision 279b80c462a87396ab8d818d4ffce5a9458e7acc)
@@ -42,10 +42,11 @@
 } dev_inferface_idx_t;
 
-#define DEV_IFACE_ID(idx) ((idx) + IPC_FIRST_USER_METHOD)
-#define DEV_IFACE_IDX(id) ((id) - IPC_FIRST_USER_METHOD)
+#define DEV_IFACE_ID(idx)	((idx) + IPC_FIRST_USER_METHOD)
+#define DEV_IFACE_IDX(id)	((id) - IPC_FIRST_USER_METHOD)
 
-#define DEV_IFACE_COUNT 				DEV_IFACE_MAX
-#define DEV_FIRST_CUSTOM_METHOD_IDX 	DEV_IFACE_MAX
-#define DEV_FIRST_CUSTOM_METHOD 		DEV_IFACE_ID(DEV_FIRST_CUSTOM_METHOD_IDX)
+#define DEV_IFACE_COUNT			DEV_IFACE_MAX
+#define DEV_FIRST_CUSTOM_METHOD_IDX	DEV_IFACE_MAX
+#define DEV_FIRST_CUSTOM_METHOD \
+	DEV_IFACE_ID(DEV_FIRST_CUSTOM_METHOD_IDX)