1 files changed, 1 insertions, 1 deletions

diff --git a/src/WixToolset.Core/DecompileResult.cs b/src/WixToolset.Core/DecompileResult.cs
index 8c9285ba..fc24cab7 100644
--- a/src/WixToolset.Core/DecompileResult.cs
+++ b/src/WixToolset.Core/DecompileResult.cs
@@ -11,7 +11,7 @@ namespace WixToolset.Core
     {
         public XDocument Document { get; set; }
 
-        public IEnumerable<string> ExtractedFilePaths { get; set; }
+        public IReadOnlyCollection<string> ExtractedFilePaths { get; set; }
 
         public Platform? Platform { get; set; }
     }