2 files changed, 10 insertions, 4 deletions

diff --git a/lisp/ChangeLog b/lisp/ChangeLog
index 6d58882e9e7..52af8847372 100644
--- a/lisp/ChangeLog
+++ b/lisp/ChangeLog
@@ -1,3 +1,9 @@
+2013-10-09  Juri Linkov  <juri@jurta.org>
+
+        * isearch.el (isearch-pre-command-hook): Use this-single-command-keys
+        instead of this-command-keys.  Add universal-argument-more and
+        universal-argument-minus to the list of prefix commands.  (Bug#15568)
+
 2013-10-09  Glenn Morris  <rgm@gnu.org>
 
         * vc/vc-svn.el (vc-svn-create-repo):
diff --git a/lisp/isearch.el b/lisp/isearch.el
index 09da9399bc8..9a1729ac7e6 100644
--- a/lisp/isearch.el
+++ b/lisp/isearch.el
@@ -2230,11 +2230,10 @@ a prefix argument command (when `isearch-allow-prefix' is non-nil),
 or it is a scrolling command (when `isearch-allow-scroll' is non-nil).
 Otherwise, exit Isearch (when `search-exit-option' is non-nil)
 before the command is executed globally with terminated Isearch."
-  (let* ((key (this-command-keys))
+  (let* ((key (this-single-command-keys))
          (main-event (aref key 0)))
     (cond
      ;; Don't exit Isearch for isearch key bindings.
-     ;; FIXME: remove prefix arg to lookup key without prefix.
      ((commandp (lookup-key isearch-mode-map key nil)))
      ;; Optionally edit the search string instead of exiting.
      ((eq search-exit-option 'edit)
@@ -2242,8 +2241,9 @@ before the command is executed globally with terminated Isearch."
      ;; Handle a scrolling function or prefix argument.
      ((or (and isearch-allow-prefix
                (memq this-command '(universal-argument
-                                    negative-argument
-                                    digit-argument)))
+                                    universal-argument-more
+                                    universal-argument-minus
+                                    digit-argument negative-argument)))
           (and isearch-allow-scroll
                (or (eq (get this-command 'isearch-scroll) t)
                    (eq (get this-command 'scroll-command) t))))