diff --git a/0001-Handle-unknown-device-classes.patch b/0001-Handle-unknown-device-classes.patch
index 3654c3b..b9cae1c 100644
--- a/0001-Handle-unknown-device-classes.patch
+++ b/0001-Handle-unknown-device-classes.patch
@@ -1,4 +1,4 @@
-From 4fe9df2e06c2f0d258f9dbc34127b8f75930f985 Mon Sep 17 00:00:00 2001
+From 635c2c029b1e73311c3f650bcaf7eeb9e782134b Mon Sep 17 00:00:00 2001
 From: Peter Hutterer <peter.hutterer@who-t.net>
 Date: Wed, 17 Aug 2011 15:20:48 +1000
 Subject: [PATCH] Handle unknown device classes.
@@ -14,8 +14,8 @@ handlers so to automatically skip any unknown classes.
 Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
 ---
  src/XExtInt.c       |   30 +++++++++++++++++++++---------
- src/XIQueryDevice.c |    2 +-
- 2 files changed, 22 insertions(+), 10 deletions(-)
+ src/XIQueryDevice.c |    4 ++--
+ 2 files changed, 23 insertions(+), 11 deletions(-)
 
 diff --git a/src/XExtInt.c b/src/XExtInt.c
 index 86a780e..9e1ad19 100644
@@ -150,9 +150,18 @@ index 86a780e..9e1ad19 100644
      return 1;
  }
 diff --git a/src/XIQueryDevice.c b/src/XIQueryDevice.c
-index 4e2f392..c8197d2 100644
+index 4e2f392..c22aee1 100644
 --- a/src/XIQueryDevice.c
 +++ b/src/XIQueryDevice.c
+@@ -29,7 +29,7 @@
+ #include <X11/extensions/extutil.h>
+ #include "XIint.h"
+ 
+-extern int copy_classes(XIDeviceInfo* to, xXIAnyInfo* from, int nclasses);
++extern int copy_classes(XIDeviceInfo* to, xXIAnyInfo* from, int *nclasses);
+ extern int size_classes(xXIAnyInfo* from, int nclasses);
+ 
+ XIDeviceInfo*
 @@ -87,7 +87,7 @@ XIQueryDevice(Display *dpy, int deviceid, int *ndevices_return)
          ptr += ((wire->name_len + 3)/4) * 4;
  
@@ -163,5 +172,5 @@ index 4e2f392..c8197d2 100644
  
      Xfree(buf);
 -- 
-1.7.6
+1.7.6.4
 
diff --git a/libXi.spec b/libXi.spec
index 1b1dcec..e590018 100644
--- a/libXi.spec
+++ b/libXi.spec
@@ -4,7 +4,7 @@
 Summary: X.Org X11 libXi runtime library
 Name: libXi
 Version: 1.4.3
-Release: 2%{?dist}
+Release: 3%{?dist}
 License: MIT
 Group: System Environment/Libraries
 URL: http://www.x.org
@@ -87,6 +87,10 @@ rm -rf $RPM_BUILD_ROOT
 %{_mandir}/man3/*.3*
 
 %changelog
+* Tue Oct 11 2011 Peter Hutterer <peter.hutterer@redhat.com> 1.4.3-3
+- Fix 0001-Handle-unknown-device-classes.patch: missing prototype change for
+  copy_classes in XIQueryDevice caused parameter corruption (#744960)
+
 * Wed Aug 17 2011 Peter Hutterer <peter.hutterer@redhat.com> 1.4.3-2
 - 0001-Handle-unknown-device-classes.patch: don't corrupt memory when a
   server sends unknown device classes.