diff --git a/src/lexer.rs b/src/lexer.rs
index 64194dc..a3047be 100644
--- a/src/lexer.rs
+++ b/src/lexer.rs
@@ -109,10 +109,10 @@ fn read_identifier(splitted: &Vec<&str>, pos: &mut usize, out: &mut Vec<Token>)
     while pos < &mut splitted.len() {
         let prev_char = splitted[*pos-1];
         let char = splitted[*pos];
-        *pos += 1;
-        if is_operator(char) || is_sep(char) || char == "\n" || char == "\r" {
+        if is_operator(char) || is_sep(char) || char == "\n" || char == "\r" || (prev_char == " " && is_number(char)) {
             break;
         }
+        *pos += 1;
         if prev_char == " " {
             word_pos.push(*pos-1);
         }