diff --git a/lib/restrictor.in.cu b/lib/restrictor.in.cu
index 595694873d..c25d8a5701 100644
--- a/lib/restrictor.in.cu
+++ b/lib/restrictor.in.cu
@@ -72,7 +72,7 @@ namespace quda {
 
     bool advanceAux(TuneParam &param) const
     {
-      if (Arg<false>::swizzle && in.size() == 1) {
+      if (Arg<false>::swizzle && in.size() < 8) {
         if (param.aux.x < 2 * (int)device::processor_count()) {
           param.aux.x++;
           return true;