UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                    FORM 8-K

                                 CURRENT REPORT

     Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

          Date of Report (Date of earliest event reported) JUNE 7, 2001

                                MITEL CORPORATION

             ------------------------------------------------------
             (Exact name of registrant as specified in its charter)

           CANADA                         1-8139                    NONE
-------------------------------    ---------------------    -------------------
(State or other jurisdiction of    (Commission File No.)    (I.R.S. Employer
incorporation or organization)                              Identification No.)

                  400 March Road
             Ottawa, Ontario, Canada                    K2K 3H4
             -----------------------                 -------------
              (Address of principal                  (Postal Code)
               executive offices)

       Registrant's telephone number, including area code: (613) 592-0200

                                350 Legget Drive
                         Kanata, Ontario, Canada K2K 2W7

          -------------------------------------------------------------
          (Former name or former address, if changed since last report)


                                       1
<PAGE>

Item 5. Other Events

                  On June 7, 2001,  Mitel  Corporation  (currently  operating as
                  Zarlink  Semiconductor)  announced that its Board of Directors
                  had  authorized the  continuation  of its normal course issuer
                  bid  program to  repurchase  up to  6,308,907  common  shares,
                  representing five percent of the 126,178,148  common shares of
                  the Company  issued and  outstanding  on May 28,  2001.  These
                  purchases  are  expected  to take  place  on the  open  market
                  through the stock  exchanges  of New York and  Toronto  over a
                  twelve-month  period  beginning  on June 9, 2001 and ending on
                  June 8,  2002,  or on such  earlier  date as the  Company  may
                  complete its purchases  pursuant to the notice of intention to
                  make a normal  course  issuer bid filed with The Toronto Stock
                  Exchange. A copy of the press release is attached to this Form
                  8-K as Exhibit 99.1 and is incorporated by reference herein.

Item 7. Financial Statements, Pro Forma Financial Information and Exhibits

                  Exhibits:

                  99.1  Press Release dated June 7, 2001


                                       2
<PAGE>

                                    SIGNATURE

Pursuant  to the  requirements  of the  Securities  Exchange  Act of  1934,  the
Registrant  has duly  caused  this  report  to be  signed  on its  behalf by the
undersigned hereunto duly authorized.

                                             MITEL CORPORATION
                                             -----------------
                                             (Registrant)

Date June 22, 2001                           Jean-Jacques Carrier
                                             --------------------
                                             Jean-Jacques Carrier
                                             Senior Vice President of Finance
                                             and Chief Financial Officer


                                       3
<PAGE>

                                  EXHIBIT 99.1

Press Release:

Mitel Corporation Continues Common Shares Purchase Program

OTTAWA,  CANADA,  June 7, 2001 - Currently  operating as Zarlink  Semiconductor,
Mitel  Corporation  (NYSE,TSE:  MLT) today announced that its Board of Directors
has  authorized  the  continuation  of its normal  course  issuer bid program to
purchase up to 6,308,907  common shares,  representing  5% of the  approximately
126,178,148  issued and  outstanding  common shares of the company as of May 28,
2001.

      These purchases are expected to occur on the open market through the stock
exchanges in New York and Toronto. The program begins June 9, 2001 and ends June
8, 2002,  or on such  earlier  date as the company may  complete  its  purchases
pursuant to the notice of  intention  to make a normal  course  issuer bid filed
with the Toronto Stock Exchange (TSE).

      From June 9, 2000 to June 5, 2001 the company did not  purchase any common
shares  under its normal  course  issuer bid program.  During this  period,  the
company was implementing  significant  strategic  business change by selling its
communications systems division and creating a focused semiconductor enterprise.
However,  during the period June 9, 1999 to June 8, 2000, the company  purchased
and cancelled  3,383,800 common shares acquired in the open market at an average
price of $10.07 per common share.

      "The  continuation  of the normal course  issuer bid program  reflects our
confidence that the purchase of our common shares is a sound  investment for our
corporate  funds and supports the company's  commitment to increase  shareholder
value," said Patrick J.

Brockett, president and CEO, Mitel Corporation.

      The  company  intends  to cancel  all common  shares  purchased  under the
program and  believes  that at present no company  director,  senior  officer or
insider intends to sell any common shares under this share purchase program.

About the Company

      Zarlink   employs  its  formidable   analog,   digital  and   mixed-signal
capabilities  to offer the most  compelling  products  for wired,  wireless  and
optical connectivity markets and ultra low power medical  applications.  Zarlink
is trading as Mitel  Corporation  on the New York and  Toronto  stock  exchanges
under the ticker  symbol "MLT" until the new legal name of the company - Zarlink
Semiconductor  Inc. - is approved by shareholders.  For more information,  visit
www.zarlink.com


<PAGE>

      Certain  statements  in  this  press  release  constitute  forward-looking
statements within the meaning of the Private Securities Litigation Reform Act of
1995.  Such   forward-looking   statements  involve  known  and  unknown  risks,
uncertainties, and other factors which may cause the actual results, performance
or  achievements  of the company,  to be  materially  different  from any future
results,   performance,   or   achievements   expressed   or   implied  by  such
forward-looking  statements.  Such risks, uncertainties and assumptions include,
among  others,  the risks  discussed in documents  filed by the Company with the
Securities  and Exchange  Commission.  Investors are  encouraged to consider the
risks detailed in those filings.

                                     - 30 -

For further information:

Jacques Guerette                                     Mike McGinn
Corporate Communications                             Investor Relations
613 592-0200                                         613 592-0200