1 files changed, 1 insertions, 1 deletions

diff --git a/src/WixToolset.Core/ResolveFileResult.cs b/src/WixToolset.Core/ResolveFileResult.cs
index 12b31d54..f6e201d4 100644
--- a/src/WixToolset.Core/ResolveFileResult.cs
+++ b/src/WixToolset.Core/ResolveFileResult.cs
@@ -9,6 +9,6 @@ namespace WixToolset.Core
     {
         public string Path { get; set; }
 
-        public IEnumerable<string> CheckedPaths { get; set; }
+        public IReadOnlyCollection<string> CheckedPaths { get; set; }
     }
 }