diff --git a/nukebuild/BuildParameters.cs b/nukebuild/BuildParameters.cs
index 45cbf00798..74870885bc 100644
--- a/nukebuild/BuildParameters.cs
+++ b/nukebuild/BuildParameters.cs
@@ -111,7 +111,7 @@ public partial class Build
             // VERSION
             Version = b.ForceNugetVersion ?? GetVersion();
 
-            ApiValidationBaseline = b.ApiValidationBaseline ?? new Version(new Version(Version).Major, 0).ToString();
+            ApiValidationBaseline = b.ApiValidationBaseline ?? new Version(new Version(Version.Split('-', StringSplitOptions.None).First()).Major, 0).ToString();
             UpdateApiValidationSuppression = b.UpdateApiValidationSuppression ?? IsLocalBuild;
             
             if (IsRunningOnAzure)