diff --git a/Grid_Cartesian.h b/Grid_Cartesian.h
index 03044bdd..488d47e9 100644
--- a/Grid_Cartesian.h
+++ b/Grid_Cartesian.h
@@ -108,9 +108,8 @@ public:
         for(int d=0;d<_ndimension;d++){
             _dimensions[d] = dimensions[d];
             _layout[d]     = layout[d];
-                
             // Use a reduced simd grid
-            _rdimensions[d]= _dimensions[d]/_layout[d];
+            _rdimensions[d]= _dimensions[d]/_layout[d]; //<-- _layout[d] is zero
             _osites *= _rdimensions[d];
             _isites *= _layout[d];
                 
diff --git a/Grid_config.h b/Grid_config.h
index b882917d..b3833326 100644
--- a/Grid_config.h
+++ b/Grid_config.h
@@ -2,10 +2,10 @@
 /* Grid_config.h.in.  Generated from configure.ac by autoheader.  */
 
 /* AVX */
-#define AVX1 1
+/* #undef AVX1 */
 
 /* AVX2 */
-/* #undef AVX2 */
+#define AVX2 1
 
 /* AVX512 */
 /* #undef AVX512 */
diff --git a/Grid_main.cc b/Grid_main.cc
index a3ef32c8..33dfc37b 100644
--- a/Grid_main.cc
+++ b/Grid_main.cc
@@ -46,12 +46,19 @@ int main (int argc, char ** argv)
     simd_layout[2] = 2;
     simd_layout[3] = 2;
 #endif
-#ifdef AVX1
+#if defined (AVX1)|| defined (AVX2)
     simd_layout[0] = 1;
     simd_layout[1] = 1;
     simd_layout[2] = 2;
     simd_layout[3] = 2;
 #endif
+#if defined (SSE2)
+    simd_layout[0] = 1;
+    simd_layout[1] = 1;
+    simd_layout[2] = 1;
+    simd_layout[3] = 2;
+#endif
+
     
     GridCartesian Fine(latt_size,simd_layout);
     GridRedBlackCartesian rbFine(latt_size,simd_layout);