1 files changed, 1 insertions, 0 deletions

diff --git a/grammar b/grammar
index 2042e97..27c3552 100644
--- a/grammar
+++ b/grammar
@@ -41,6 +41,7 @@ unary-op
 	| "+"
 	| "-"
 	| "&"
+	| "!"
 	;
 
 binary-op