diff --git a/drivers/staging/hv/ring_buffer.c b/drivers/staging/hv/ring_buffer.c
index 9212699a6632fa1f2f2076b71bad46472a2467d2..70e2e66fec716d0becbaddc00d8f8a237714b3d0 100644
--- a/drivers/staging/hv/ring_buffer.c
+++ b/drivers/staging/hv/ring_buffer.c
@@ -34,7 +34,8 @@
 
 
 /* Amount of space to write to */
-#define BYTES_AVAIL_TO_WRITE(r, w, z) ((w) >= (r)) ? ((z) - ((w) - (r))) : ((r) - (w))
+#define BYTES_AVAIL_TO_WRITE(r, w, z) \
+	((w) >= (r)) ? ((z) - ((w) - (r))) : ((r) - (w))
 
 
 /*