diff --git a/gutenprint.spec b/gutenprint.spec
index 3c8a747..3161f21 100644
--- a/gutenprint.spec
+++ b/gutenprint.spec
@@ -127,6 +127,9 @@ Epson, HP and compatible printers..
 %patch2 -p1 -b .O6
 
 %build
+%ifarch ppc64
+export CFLAGS=${CFLAGS} -O0
+%endif
 %configure --disable-static --disable-dependency-tracking  \
             --with-foomatic --with-ghostscript \
             --disable-libgutenprintui --without-gimp \
@@ -232,7 +235,8 @@ exit 0
 /bin/rm -f /var/cache/foomatic/*
 
 %changelog
-* Fri May  4 2007 Tim Waugh <twaugh@redhat.com> 5.0.0.99.1-3
+* Thu May 10 2007 Tim Waugh <twaugh@redhat.com> 5.0.0.99.1-3
+- Try to work around GCC bug #239003.
 - Don't add extra compiler flags.
 - Moved gimp-print obsoletes/provides to the foomatic sub-package
   (bug #238890).