diff --git a/MobiFlight/MobiFlightModule.cs b/MobiFlight/MobiFlightModule.cs
index 75167cc3..3fb977d3 100644
--- a/MobiFlight/MobiFlightModule.cs
+++ b/MobiFlight/MobiFlightModule.cs
@@ -137,7 +137,7 @@ public bool HasMfFirmware()
         // Returns true if the board is running a firmware build from a pull request.
         public bool IsPullRequestBuild
         {
-            get { return Version?.StartsWith("0.0.") ?? false; }
+            get { return CoreVersion?.StartsWith("0.0.") ?? false; }
         }
 
         public Config.Config Config