diff --git a/src/passes/1-parser/shared/Lexer.mll b/src/passes/1-parser/shared/Lexer.mll
index 46e8d57b9..f2172595f 100644
--- a/src/passes/1-parser/shared/Lexer.mll
+++ b/src/passes/1-parser/shared/Lexer.mll
@@ -520,7 +520,7 @@ let esc        = "\\n" | "\\\"" | "\\\\" | "\\b"
                | "\\r" | "\\t" | "\\x" byte
 let symbol     = ';' | ',' | '(' | ')'| '[' | ']' | '{' | '}'
                | '#' | '|' | "->" | ":=" | '=' | ':'
-               | '<' | "<=" | '>' | ">=" | "=/="
+               | '<' | "<=" | '>' | ">=" | "=/=" | "<>"
                | '+' | '-' | '*' | '/' | '.' | '_' | '^'
                | "::" | "||" | "&&"
 let string     = [^'"' '\\' '\n']*  (* For strings of #include *)