1 files changed, 1 insertions, 1 deletions

diff --git a/src/WixToolset.Extensibility/Data/IDecompileResult.cs b/src/WixToolset.Extensibility/Data/IDecompileResult.cs
index ad4d0841..cffd0976 100644
--- a/src/WixToolset.Extensibility/Data/IDecompileResult.cs
+++ b/src/WixToolset.Extensibility/Data/IDecompileResult.cs
@@ -11,7 +11,7 @@ namespace WixToolset.Extensibility.Data
     {
         XDocument Document { get; set; }
 
-        IEnumerable<string> ExtractedFilePaths { get; set; }
+        IReadOnlyCollection<string> ExtractedFilePaths { get; set; }
 
         Platform? Platform { get; set; }
     }