diff --git a/crates/gui/src/expression_parser.rs b/crates/gui/src/expression_parser.rs
index f9a3202..cef2b08 100644
--- a/crates/gui/src/expression_parser.rs
+++ b/crates/gui/src/expression_parser.rs
@@ -120,7 +120,10 @@ fn eval_expr(lexer: &mut LexerWrapper, min_binding_power: usize) -> Result<f64,
             }
             Ok(res)
         }
-        Some(Token::Number(value)) => Ok(value),
+        Some(Token::Number(value)) => {
+            lexer.advance()?;
+            Ok(value)
+        }
         Some(Token::Plus) => {
             lexer.advance()?;
             let inner_value = eval_expr(lexer, prefix_binding_power(&Token::Plus))?;
@@ -136,8 +139,6 @@ fn eval_expr(lexer: &mut LexerWrapper, min_binding_power: usize) -> Result<f64,
         _ => Err(ParseError::new("Invalid left-hand side")),
     }?;
 
-    lexer.advance()?;
-
     loop {
         let op = match lexer.cur {
             Some(token) => match token {