diff --git a/lisp/ibuf-ext.el b/lisp/ibuf-ext.el
index 95ff014aa5b..9ad033b5fdb 100644
--- a/lisp/ibuf-ext.el
+++ b/lisp/ibuf-ext.el
@@ -598,7 +598,7 @@ revert
 (define-ibuffer-op ibuffer-do-isearch ()
   "Perform a `isearch-forward' in marked buffers."
   (:interactive ()
-   :opstring "searched in"
+   :no-opstring t
    :complex t
    :modifier-p :maybe)
   (multi-isearch-buffers (ibuffer-get-marked-buffers)))
@@ -607,7 +607,7 @@ ibuffer-do-isearch
 (define-ibuffer-op ibuffer-do-isearch-regexp ()
   "Perform a `isearch-forward-regexp' in marked buffers."
   (:interactive ()
-   :opstring "searched regexp in"
+   :no-opstring t
    :complex t
    :modifier-p :maybe)
   (multi-isearch-buffers-regexp (ibuffer-get-marked-buffers)))
diff --git a/lisp/ibuf-macs.el b/lisp/ibuf-macs.el
index 1fd94967836..ace1972054f 100644
--- a/lisp/ibuf-macs.el
+++ b/lisp/ibuf-macs.el
@@ -166,6 +166,7 @@ define-ibuffer-op
 				  mark
 				  modifier-p
 				  dangerous
+				  no-opstring
 				  (opstring "operated on")
 				  (active-opstring "Operate on")
                                   before
@@ -196,6 +197,8 @@ define-ibuffer-op
 OPSTRING is a string which will be displayed to the user after the
 operation is complete, in the form:
  \"Operation complete; OPSTRING x buffers\"
+NO-OPSTRING is a boolean which should be set to suppress the message
+after the operation is complete.
 ACTIVE-OPSTRING is a string which will be displayed to the user in a
 confirmation message, in the form:
  \"Really ACTIVE-OPSTRING x buffers?\"
@@ -246,9 +249,10 @@ define-ibuffer-op
 			    ())
                           (and after `(,after)) ; post-operation form.
 			  `((ibuffer-redisplay t)
-			    (message ,(concat "Operation finished; " opstring
-                                              " %s %s")
-                                     count (ngettext "buffer" "buffers" count)))))
+			    (unless ,no-opstring
+			      (message ,(concat "Operation finished; " opstring
+						" %s %s")
+                                       count (ngettext "buffer" "buffers" count))))))
 		 (inner-body (if complex
 				 `(progn ,@body)
 			       `(progn