diff --git a/cytosol-parser/src/lexer.rs b/cytosol-parser/src/lexer.rs
index 4c99794..0a239a7 100644
--- a/cytosol-parser/src/lexer.rs
+++ b/cytosol-parser/src/lexer.rs
@@ -83,6 +83,7 @@ pub enum TokenKind<'src> {
 
     #[token("=")]
     OpEquals,
+    #[token("/=")]
     #[token("!=")]
     #[token("≠")]
     OpNotEquals,