diff --git a/build/nightly-build-trigger.yml b/build/nightly-build-trigger.yml
index f8147da05c..1b70e6c9e5 100644
--- a/build/nightly-build-trigger.yml
+++ b/build/nightly-build-trigger.yml
@@ -1,5 +1,6 @@
 name: Nightly_$(TeamProject)_$(Build.DefinitionName)_$(SourceBranchName)_$(Date:yyyyMMdd)$(Rev:.r)
 
+pr: none
 trigger: none
 
 schedules: