diff --git a/src/dsl.cc b/src/dsl.cc
index 6131eb98..bb2613e9 100644
--- a/src/dsl.cc
+++ b/src/dsl.cc
@@ -602,7 +602,7 @@ void DslDictionary::getResource( string const & name,
 
   try
   {
-    File::Class f( n, "r" );
+    File::Class f( n, "rb" );
 
     f.seekEnd();