1 files changed, 1 insertions, 1 deletions
diff --git a/Grow.c b/Grow.c
index 125606c..bc8a73f 100644
--- a/Grow.c
+++ b/Grow.c
@@ -272,7 +272,7 @@ int Grow_addbitmap(char *devname, int fd, char *file, int chunk, int delay, int
 	}
 
 	if (array.level == 10) {
-		int ncopies = (array.layout&255)*(array.layout>>8);
+		int ncopies = (array.layout&255)*((array.layout>>8)&255);
 		bitmapsize = bitmapsize * array.raid_disks / ncopies;
 	}