diff --git a/Grid/simd/Grid_vector_types.h b/Grid/simd/Grid_vector_types.h
index c726660f..e4e0832a 100644
--- a/Grid/simd/Grid_vector_types.h
+++ b/Grid/simd/Grid_vector_types.h
@@ -116,13 +116,13 @@ accelerator_inline Grid_half sfw_float_to_half(float ff) {
 #endif
 */
 #ifdef GEN
-  #if defined A64FX // breakout A64FX SVE ACLE here
-  #pragma message("building for A64FX / SVE ACLE")
-  #define ARMCLANGHOTFIX
-  #include "Grid_a64fx-2.h"
+  #if defined(A64FX) // breakout A64FX SVE ACLE here
+    #pragma message("building for A64FX / SVE ACLE")
+    #define ARMCLANGHOTFIX
+    #include "Grid_a64fx-2.h"
+  #else
+    #include "Grid_generic.h"
   #endif
-#else
-  #include "Grid_generic.h"
 #endif
 
 #ifdef SSE4