diff --git a/src/backend/postmaster/walsummarizer.c b/src/backend/postmaster/walsummarizer.c
index 83c178e7662..191b360bef4 100644
--- a/src/backend/postmaster/walsummarizer.c
+++ b/src/backend/postmaster/walsummarizer.c
@@ -682,6 +682,8 @@ WaitForWalSummarization(XLogRecPtr lsn, long timeout, XLogRecPtr *pending_lsn)
 									WAIT_EVENT_WAL_SUMMARY_READY);
 	}
 
+	ConditionVariableCancelSleep();
+
 	return summarized_lsn;
 }