Remove empty macro.
diff --git a/man/zip_source_function.mdoc b/man/zip_source_function.mdoc
index 4cdfd44..80e3a95 100644
--- a/man/zip_source_function.mdoc
+++ b/man/zip_source_function.mdoc
@@ -241,7 +241,6 @@
 or
 .Dv ZIP_SOURCE_ROLLBACK_WRITE
 will be called.
-.Dv
 .Pp
 .Dv ZIP_SOURCE_STAT
 can be issued at any time.