1 files changed, 1 insertions, 1 deletions

diff --git a/src/wixext/NetfxWindowsInstallerBackendExtension.cs b/src/wixext/NetfxWindowsInstallerBackendExtension.cs
index e1404c1a..7d4fe475 100644
--- a/src/wixext/NetfxWindowsInstallerBackendExtension.cs
+++ b/src/wixext/NetfxWindowsInstallerBackendExtension.cs
@@ -8,6 +8,6 @@ namespace WixToolset.Netfx
 
     public class NetfxWindowsInstallerBackendBinderExtension : BaseWindowsInstallerBackendBinderExtension
     {
-        public override IEnumerable<TableDefinition> TableDefinitions => NetfxTableDefinitions.All;
+        public override IReadOnlyCollection<TableDefinition> TableDefinitions => NetfxTableDefinitions.All;
     }
 }