1 files changed, 1 insertions, 1 deletions

diff --git a/src/WixToolset.Core/Bind/ExtractEmbeddedFiles.cs b/src/WixToolset.Core/Bind/ExtractEmbeddedFiles.cs
index 35c8a2f0..a0798e62 100644
--- a/src/WixToolset.Core/Bind/ExtractEmbeddedFiles.cs
+++ b/src/WixToolset.Core/Bind/ExtractEmbeddedFiles.cs
@@ -50,7 +50,7 @@ namespace WixToolset.Core.Bind
             return extractPath;
         }
 
-        public IEnumerable<ExpectedExtractFile> GetExpectedEmbeddedFiles()
+        public IReadOnlyList<ExpectedExtractFile> GetExpectedEmbeddedFiles()
         {
             var files = new List<ExpectedExtractFile>();