--- a/NAMESPACE
+++ b/NAMESPACE
@@ -18,7 +18,7 @@
 S3method(summary, mcarray)
 S3method(print, summary.mcarray)
 S3method(as.mcmc.list, mcarray)
-S3method(Ops, dic)
+S3method("-", dic)
 S3method(print, dic)
 S3method(as.mcmc, dic)
 S3method(print, diffdic)