diff --git a/eng/build.ps1 b/eng/build.ps1
index 4d52123fd2273..ac69f2ae7dfc8 100644
--- a/eng/build.ps1
+++ b/eng/build.ps1
@@ -41,7 +41,7 @@ param (
     [switch]$deployExtensions,
     [switch]$prepareMachine,
     [switch]$useGlobalNuGetCache = $true,
-    [switch]$warnAsError = $true,
+    [switch]$warnAsError,
 
     # Test actions
     [switch]$test32,