diff --git a/src/raddbg/raddbg_core.c b/src/raddbg/raddbg_core.c
index 98c750a9..8c560241 100644
--- a/src/raddbg/raddbg_core.c
+++ b/src/raddbg/raddbg_core.c
@@ -11459,7 +11459,6 @@ rd_frame(void)
   //
   Access *frame_access_restore = rd_state->frame_access;
   rd_state->frame_access = access_open();
-  rd_state->got_frame_call_stack_tree = 0;
   
   //////////////////////////////
   //- rjf: calculate avg length in us of last many frames
diff --git a/src/raddbg/raddbg_core.h b/src/raddbg/raddbg_core.h
index dcc4a6b9..7afccd02 100644
--- a/src/raddbg/raddbg_core.h
+++ b/src/raddbg/raddbg_core.h
@@ -579,8 +579,6 @@ struct RD_State
   // rjf: frame parameters
   F32 frame_dt;
   Access *frame_access;
-  CTRL_CallStackTree frame_call_stack_tree;
-  B32 got_frame_call_stack_tree;
   
   // rjf: evaluation cache
   E_Cache *eval_cache;
diff --git a/src/raddbg/raddbg_eval.c b/src/raddbg/raddbg_eval.c
index 785f1475..291ac872 100644
--- a/src/raddbg/raddbg_eval.c
+++ b/src/raddbg/raddbg_eval.c
@@ -1558,17 +1558,15 @@ struct RD_CallStackTreeExpandAccel
 
 E_TYPE_EXPAND_INFO_FUNCTION_DEF(call_stack_tree)
 {
-  if(!rd_state->got_frame_call_stack_tree)
-  {
-    rd_state->got_frame_call_stack_tree = 1;
-    rd_state->frame_call_stack_tree = ctrl_call_stack_tree(rd_state->frame_access, 0);
-  }
+  Access *access = access_open();
+  CTRL_CallStackTree call_stack_tree = ctrl_call_stack_tree(access, 0);
+  access_close(access);
   RD_CallStackTreeExpandAccel *accel = push_array(arena, RD_CallStackTreeExpandAccel, 1);
   accel->node = &ctrl_call_stack_tree_node_nil;
   U64 id = e_value_eval_from_eval(eval).value.u64;
-  if(rd_state->frame_call_stack_tree.slots_count != 0)
+  if(call_stack_tree.slots_count != 0)
   {
-    for(CTRL_CallStackTreeNode *n = rd_state->frame_call_stack_tree.slots[id%rd_state->frame_call_stack_tree.slots_count];
+    for(CTRL_CallStackTreeNode *n = call_stack_tree.slots[id%call_stack_tree.slots_count];
         n != 0;
         n = n->hash_next)
     {