diff --git a/src/vm/vector_functions.cpp b/src/vm/vector_functions.cpp
index 5f1b974..395091a 100644
--- a/src/vm/vector_functions.cpp
+++ b/src/vm/vector_functions.cpp
@@ -44,6 +44,7 @@
 #include <nonstd/variant.hpp>
 
 namespace softvector {
+unsigned RFS = 32;
 
 bool softvec_read(void* core, uint64_t addr, uint64_t length, uint8_t* data) {
     iss::status status = static_cast<iss::arch_if*>(core)->read(iss::address_type::PHYSICAL, iss::access_type::READ,
@@ -108,7 +109,7 @@ uint64_t vector_load_store(void* core, std::function<bool(void*, uint64_t, uint6
         for(unsigned s_idx = 0; s_idx < segment_size; s_idx++) {
             // base + selected vd + current_elem + current_segment
             uint8_t* dest_elem = V + (vd * VLEN / 8) + (eew / 8 * idx) + (VLEN / 8 * s_idx * emul_stride);
-            assert(dest_elem <= V + VLEN * 32 / 8);
+            assert(dest_elem <= V + VLEN * RFS / 8);
             if(mask_active) {
                 uint64_t addr = base_addr + (eew / 8) * (idx * segment_size + s_idx) * stride;
                 if(!load_store_fn(core, addr, eew / 8, dest_elem))
@@ -126,7 +127,7 @@ uint64_t vector_load_store(void* core, std::function<bool(void*, uint64_t, uint6
         for(unsigned s_idx = 0; s_idx < segment_size; s_idx++) {
             // base + selected vd + current_elem + current_segment
             uint8_t* dest_elem = V + (vd * VLEN / 8) + (eew / 8 * idx) + (VLEN / 8 * s_idx * emul_stride);
-            assert(dest_elem <= V + VLEN * 32 / 8);
+            assert(dest_elem <= V + VLEN * RFS / 8);
             // this only updates the first 8 bits, so eew > 8 would not work correctly
             *dest_elem = vtype.vta() ? *dest_elem : *dest_elem;
         }