1 files changed, 1 insertions, 1 deletions

diff --git a/src/WixToolset.Core/ExtensibilityServices/WindowsInstallerBackendHelper.cs b/src/WixToolset.Core/ExtensibilityServices/WindowsInstallerBackendHelper.cs
index 753b8b34..a923a8cc 100644
--- a/src/WixToolset.Core/ExtensibilityServices/WindowsInstallerBackendHelper.cs
+++ b/src/WixToolset.Core/ExtensibilityServices/WindowsInstallerBackendHelper.cs
@@ -21,7 +21,7 @@ namespace WixToolset.Core.ExtensibilityServices
 
         public bool TryAddTupleToOutputMatchingTableDefinitions(IntermediateSection section, IntermediateTuple tuple, WindowsInstallerData output, TableDefinitionCollection tableDefinitions)
         {
-            var tableDefinition = tableDefinitions.FirstOrDefault(t => t.TupleDefinitionName == tuple.Definition.Name);
+            var tableDefinition = tableDefinitions.FirstOrDefault(t => t.TupleDefinition?.Name == tuple.Definition.Name);
             if (tableDefinition == null)
             {
                 return false;