diff --git a/src/osgDB/Archive.cpp b/src/osgDB/Archive.cpp
index 07bc5c832..7488ad7df 100644
--- a/src/osgDB/Archive.cpp
+++ b/src/osgDB/Archive.cpp
@@ -151,7 +151,12 @@ bool Archive::IndexBlock::addFileReference(pos_type position, const std::string&
         _requiresWrite = true;
 
         osg::notify(osg::NOTICE)<<"Archive::IndexBlock::addFileReference("<<(unsigned int)position<<", "<<filename<<")"<<std::endl;
-
+        
+        return true;
+    }
+    else
+    {
+        return false;
     }
 }