diff --git a/cluster.cc b/cluster.cc
index 697c3c79cbdefcc7f331e39ff4305ea51312579b..e4c7c62f55f82f37b2d16d8110037ed6b6bc24e1 100644
--- a/cluster.cc
+++ b/cluster.cc
@@ -22,7 +22,7 @@ using std::vector;
 using namespace Utilities;
 
 string title="cluster (Version 1.0)\nCopyright(c) 2000, University of Oxford (Mark Jenkinson)";
-string examples="cluster --in <filename> --thresh <value> [options]";
+string examples="cluster --in=<filename> --thresh=<value> [options]";
 
 Option<bool> verbose(string("-v,--verbose"), false, 
 		     string("switch on diagnostic messages"),