diff --git a/src/spesh/frame_walker.c b/src/spesh/frame_walker.c
index 8486c53471..aa42873ec5 100644
--- a/src/spesh/frame_walker.c
+++ b/src/spesh/frame_walker.c
@@ -342,7 +342,7 @@ MVMObject * MVM_spesh_frame_walker_get_lexicals_hash(MVMThreadContext *tc, MVMSp
         MVMuint32 i;
         for (i = 0; i < sf->body.num_lexicals; i++) {
             MVMuint16 type = sf->body.lexical_types[i];
-            MVMuint32 idx = base_index + lexreg[i]->value;
+            MVMuint32 idx = base_index + i;
             switch (type) {
                 case MVM_reg_obj: {
                     MVMObject *obj = frame->env[idx].o;