diff --git a/mono.spec b/mono.spec
index a4278f3..c05ea0d 100644
--- a/mono.spec
+++ b/mono.spec
@@ -220,9 +220,13 @@ which is fully managed and actively maintained.
 %setup -q
 
 %build
+%ifarch ia64
+export CFLAGS="-O2 -fno-strict-aliasing"
+%else
 export CFLAGS="$RPM_OPT_FLAGS -fno-strict-aliasing"
+%endif
+
 %configure --with-ikvm=yes
-make clean
 make %{?_smp_mflags}