diff --git a/src/main/scala/xiangshan/backend/ftq/Ftq.scala b/src/main/scala/xiangshan/backend/ftq/Ftq.scala
index f55cc7d453a86168f6e313d6e1d944f621adecb3..03e3efcc05c383f1c4a8fbc5600e4396925f18fe 100644
--- a/src/main/scala/xiangshan/backend/ftq/Ftq.scala
+++ b/src/main/scala/xiangshan/backend/ftq/Ftq.scala
@@ -281,7 +281,9 @@ class Ftq extends XSModule with HasCircularQueuePtrHelper {
         s := s_invalid
       }
     })
-    commitStateQueue(next.value).foreach(_ := s_invalid)
+    when(next.value =/= headPtr.value){ // if next.value === headPtr.value, ftq is full
+      commitStateQueue(next.value).foreach(_ := s_invalid)
+    }
   }
 
   XSPerf("ftqEntries", validEntries)