diff --git a/sane-backends.changes b/sane-backends.changes
index 376766d..fcb810a 100644
--- a/sane-backends.changes
+++ b/sane-backends.changes
@@ -1,3 +1,11 @@
+-------------------------------------------------------------------
+Wed Sep 22 14:08:26 CEST 2010 - jsmeix@suse.de
+
+- Configure with --enable-pthread so that backends can use
+  POSIX threads to implement asynchronous I/O instead of
+  the default which uses a pipe and forks a reader process
+  (see openSUSE/Novell Bugzilla bnc#633780).
+
 -------------------------------------------------------------------
 Wed Sep 15 08:51:03 UTC 2010 - aj@suse.de
 
diff --git a/sane-backends.spec b/sane-backends.spec
index 11c2d57..dee4a27 100644
--- a/sane-backends.spec
+++ b/sane-backends.spec
@@ -31,7 +31,7 @@ Group:          Hardware/Scanner
 AutoReqProv:    on
 Summary:        SANE (Scanner Access Now Easy) Scanner Drivers
 Version:        1.0.21
-Release:        6
+Release:        7
 Url:            http://www.sane-project.org/
 # URL for Source0: https://alioth.debian.org/frs/download.php/3258/sane-backends-1.0.21.tar.gz
 # MD5 sum for upstream sane-backends-1.0.21.tar.gz (not our .bz2): be586a23633949cf2ecf0c9c6d769130
@@ -389,7 +389,9 @@ chmod u+x create_scanner_database
 autoreconf -fi
 export CFLAGS="$RPM_OPT_FLAGS -D_GNU_SOURCE -DGIMP_ENABLE_COMPAT_CRUFT=1 -fno-strict-aliasing"
 export LDFLAGS="-L/%_lib $LDFLAGS"
-# Disable locking because /var/lock/sane/ would be a world-writable directory:
+# Enable pthread instead of fork (used in Debian since Feb 2009 and no issues so far),
+# see https://bugzilla.novell.com/show_bug.cgi?id=633780
+# Disable locking because /var/lock/sane/ would be a world-writable directory.
 ./configure --prefix=/usr \
             --exec-prefix=/usr \
             --sysconfdir=%{_sysconfdir} \
@@ -399,6 +401,7 @@ export LDFLAGS="-L/%_lib $LDFLAGS"
             --datadir=%{_datadir} \
             --with-gphoto2 \
             --with-docdir=%{_defaultdocdir}/sane-backends \
+            --enable-pthread \
             --disable-locking
 # Enable locking for backends where "99" is the group of the lockfile path (LOCKPATH_GROUP)
 # because "99" is the group of the user who runs the build when norootforbuild is used