1 files changed, 1 insertions, 1 deletions

diff --git a/src/wixext/UtilWindowsInstallerBackendExtension.cs b/src/wixext/UtilWindowsInstallerBackendExtension.cs
index f872ec1a..bca7c700 100644
--- a/src/wixext/UtilWindowsInstallerBackendExtension.cs
+++ b/src/wixext/UtilWindowsInstallerBackendExtension.cs
@@ -8,6 +8,6 @@ namespace WixToolset.Util
 
     public class UtilWindowsInstallerBackendBinderExtension : BaseWindowsInstallerBackendBinderExtension
     {
-        public override IEnumerable<TableDefinition> TableDefinitions => UtilTableDefinitions.All;
+        public override IReadOnlyCollection<TableDefinition> TableDefinitions => UtilTableDefinitions.All;
     }
 }