diff --git a/fftw.spec b/fftw.spec
index b7b8c6b..c8cc140 100644
--- a/fftw.spec
+++ b/fftw.spec
@@ -1,6 +1,6 @@
 Name:           fftw
 Version:        3.3.3
-Release:        1%{?dist}
+Release:        2%{?dist}
 Summary:        A Fast Fourier Transform library
 Group:          System Environment/Libraries
 License:        GPLv2+
@@ -149,8 +149,9 @@ export F77=gfortran
 %endif
 
 BASEFLAGS="--enable-shared --disable-dependency-tracking --enable-threads"
+
 %if %{openmp}
-BASEFLAGS="$BASEFLAGS --enable-openmp"
+BASEFLAGS+=" --enable-openmp"
 %endif
 
 # Precisions to build
@@ -165,6 +166,13 @@ prec_flags[1]=--enable-double
 prec_flags[2]=--enable-long-double
 prec_flags[3]=--enable-quad-precision
 
+%ifarch x86_64
+# x86_64 always has SSE2, enable it for single and double
+for((i=0;i<2;i++)); do
+ prec_flags[i]+=" --enable-sse2"
+done
+%endif
+
 # Loop over precisions
 %if %{quad}
 for((iprec=0;iprec<4;iprec++))
@@ -292,6 +300,9 @@ fi
 %{_libdir}/libfftw3*.a
 
 %changelog
+* Tue Dec 18 2012 Susi Lehtola <jussilehtola@fedoraproject.org> - 3.3.3-2
+- Enable SSE2 on x86_64.
+
 * Mon Nov 26 2012 Jussi Lehtola <jussilehtola@fedoraproject.org> - 3.3.3-1
 - Update to 3.3.3.