diff --git a/src/ast.rs b/src/ast.rs
index 5cc83c1..7c0fdcf 100644
--- a/src/ast.rs
+++ b/src/ast.rs
@@ -323,7 +323,7 @@ impl Node for Expression {
                 }
 
                 let stack_position = state.variables.len()
-                    - state.variables.iter().position(|x| x == name).unwrap()
+                    - state.variables.iter().rposition(|x| x == name).unwrap()
                     - 1;
 
                 dbg!(&state.variables);