diff --git a/src/vm/vector_functions.cpp b/src/vm/vector_functions.cpp
index 5ca248d..e876c3e 100644
--- a/src/vm/vector_functions.cpp
+++ b/src/vm/vector_functions.cpp
@@ -71,7 +71,7 @@ struct vreg_view {
 
 vtype_t::vtype_t(uint32_t vtype_val) { underlying = (vtype_val & 0x8000) << 32 | (vtype_val & ~0x8000); }
 vtype_t::vtype_t(uint64_t vtype_val) { underlying = vtype_val; }
-bool vtype_t::vill() { return underlying >> 31; }
+bool vtype_t::vill() { return underlying >> 63; }
 bool vtype_t::vma() { return (underlying >> 7) & 1; }
 bool vtype_t::vta() { return (underlying >> 6) & 1; }
 unsigned vtype_t::sew() {