diff --git a/Eigen/src/Geometry/arch/Geometry_SSE.h b/Eigen/src/Geometry/arch/Geometry_SSE.h
index cbe695c72..2af32678d 100644
--- a/Eigen/src/Geometry/arch/Geometry_SSE.h
+++ b/Eigen/src/Geometry/arch/Geometry_SSE.h
@@ -96,7 +96,7 @@ struct quat_product<Architecture::SSE, Derived, OtherDerived, double, Aligned>
    */
   t1 = padd(pmul(a_ww, b_xy), pmul(a_yy, b_zw));
   t2 = psub(pmul(a_zz, b_xy), pmul(a_xx, b_zw));
-#ifdef __SSE3__
+#ifdef EIGEN_VECTORIZE_SSE3
   EIGEN_UNUSED_VARIABLE(mask)
   pstore(&res.x(), _mm_addsub_pd(t1, preverse(t2)));
 #else
@@ -110,7 +110,7 @@ struct quat_product<Architecture::SSE, Derived, OtherDerived, double, Aligned>
    */
   t1 = psub(pmul(a_ww, b_zw), pmul(a_yy, b_xy));
   t2 = padd(pmul(a_zz, b_zw), pmul(a_xx, b_xy));
-#ifdef __SSE3__
+#ifdef EIGEN_VECTORIZE_SSE3
   EIGEN_UNUSED_VARIABLE(mask)
   pstore(&res.z(), preverse(_mm_addsub_pd(preverse(t1), t2)));
 #else