diff --git a/src/BuildUtil/CoreUtil/Cache.cs b/src/BuildUtil/CoreUtil/Cache.cs
index d8a5c37f..43225371 100644
--- a/src/BuildUtil/CoreUtil/Cache.cs
+++ b/src/BuildUtil/CoreUtil/Cache.cs
@@ -296,11 +296,11 @@ namespace CoreUtil
 		{
 			bool do_delete = false;
 			long now = Tick64.Value;
-			long delete_inveral = expireSpan.Milliseconds / 10;
+			long delete_interval = expireSpan.Milliseconds / 10;
 
 			lock (lockObj)
 			{
-				if (last_deleted == 0 || now > (last_deleted + delete_inveral))
+				if (last_deleted == 0 || now > (last_deleted + delete_interval))
 				{
 					last_deleted = now;
 					do_delete = true;