diff --git a/lexer.h b/lexer.h
index 45b4ad2..28bae8a 100644
--- a/lexer.h
+++ b/lexer.h
@@ -219,6 +219,7 @@ static const oper_info c_operators[] = {
     { "&=",  2, opid2('&','='),     ASSOC_RIGHT, 2,  0 },
     { "^=",  2, opid2('^','='),     ASSOC_RIGHT, 2,  0 },
     { "|=",  2, opid2('|','='),     ASSOC_RIGHT, 2,  0 },
+    { "&~=", 2, opid3('&','~','='), ASSOC_RIGHT, 2,  0 },
 
     { ":",   0, opid2(':','?'),     ASSOC_RIGHT, 1,  0 },