diff --git a/sentinel-core/src/main/java/com/alibaba/csp/sentinel/slots/statistic/base/LeapArray.java b/sentinel-core/src/main/java/com/alibaba/csp/sentinel/slots/statistic/base/LeapArray.java
index e67b40e99a..4fe6ed0abf 100755
--- a/sentinel-core/src/main/java/com/alibaba/csp/sentinel/slots/statistic/base/LeapArray.java
+++ b/sentinel-core/src/main/java/com/alibaba/csp/sentinel/slots/statistic/base/LeapArray.java
@@ -268,7 +268,7 @@ public boolean isWindowDeprecated(/*@NonNull*/ WindowWrap<T> windowWrap) {
     }
 
     public boolean isWindowDeprecated(long time, WindowWrap<T> windowWrap) {
-        return time - windowWrap.windowStart() > intervalInMs;
+        return time - windowWrap.windowStart() >= intervalInMs;
     }
 
     /**