diff --git a/src/db/atdb_lex.l b/src/db/atdb_lex.l
index afce5c08e..8cc5b4fc6 100644
--- a/src/db/atdb_lex.l
+++ b/src/db/atdb_lex.l
@@ -1,6 +1,6 @@
 b       [a-zA-Z0-9_]
 a	[ \t]
-d       [a-zA-Z0-9_\,\./\*#\[\]%:;!|\'\-&\(\)@\?\+<>=$]
+d       [a-zA-Z0-9_\,\./\*#\[\]%:;!|\'\-&\(\)@\?\+<>=$\^\~]
 
 %{