diff --git a/HISTORY b/HISTORY
index 87857d87..7d08a3c3 100644
--- a/HISTORY
+++ b/HISTORY
@@ -1,9 +1,11 @@
 SnapRAID HISTORY
 ================
 
-5.3 2014/1 (BETA)
+5.3 2014/2
 =================
  * Don't warn about UUID changed if it's for an empty disk.
+ * Fixed the number of blocks that scrub has to process when
+   selecting a high percentage of the array.
 
 5.2 2013/12
 ===========
diff --git a/scrub.c b/scrub.c
index 28b19006..c97d48cc 100644
--- a/scrub.c
+++ b/scrub.c
@@ -471,7 +471,7 @@ int state_scrub(struct snapraid_state* state, int percentage, int olderthan)
 		recentlimit = now;
 	} else if (percentage != -1 || olderthan != -1) {
 		if (percentage != -1)
-			countlimit = (blockmax * percentage + 99) / 100;
+			countlimit = (blockmax * (uint64_t)percentage + 99) / 100;
 		else
 			countlimit = blockmax;
 		if (olderthan != -1)