diff --git a/ExprLexer.g4 b/ExprLexer.g4
index 8e6c8b6..4e6dcc0 100644
--- a/ExprLexer.g4
+++ b/ExprLexer.g4
@@ -208,7 +208,7 @@ Colon: ':';
 EqualTo: '==';
 LessThanEqualTo: '<=';
 GreaterThanEqualTo: '>=';
-NotEqualTO: '!=';
+NotEqualTo: '!=';
 ConditionalAND: '&&';
 ConditionalOR: '||';
 Increment: '++';