diff --git a/configure b/configure
index 981ab2a..564099a 100755
--- a/configure
+++ b/configure
@@ -271,7 +271,7 @@
 PACKAGE_STRING=
 PACKAGE_BUGREPORT=
 
-ac_unique_file="rdr/InStream.h"
+ac_unique_file="vncviewer_unix/vncviewer.cxx"
 # Factoring default headers for most tests.
 ac_includes_default="\
 #include <stdio.h>