1 files changed, 2 insertions, 2 deletions

diff --git a/src/WixToolset.Core/PreprocessContext.cs b/src/WixToolset.Core/PreprocessContext.cs
index 151506e2..749bf213 100644
--- a/src/WixToolset.Core/PreprocessContext.cs
+++ b/src/WixToolset.Core/PreprocessContext.cs
@@ -21,9 +21,9 @@ namespace WixToolset.Core
 
         public Platform Platform { get; set; }
 
-        public IList<string> IncludeSearchPaths { get; set; }
+        public IEnumerable<string> IncludeSearchPaths { get; set; }
 
-        public string SourceFile { get; set; }
+        public string SourcePath { get; set; }
 
         public IDictionary<string, string> Variables { get; set; }