Use ',source.

diff --git a/lisp/nnmail.el b/lisp/nnmail.el
index cf43fca..bf4f56f 100644 (file)
--- a/lisp/nnmail.el
+++ b/lisp/nnmail.el
@@ -1575,7 +1575,7 @@ See the documentation for the variable `nnmail-split-fancy' for documentation."
                         ',spool-func
                         (if (equal file orig-file)
                             nil
-                          (nnmail-get-split-group orig-file ,source))
+                          (nnmail-get-split-group orig-file ',source))
                         ',(intern (format "%s-active-number" method))))))
          (incf total new)
          (incf i)))