diff --git a/src/honeysql/format.clj b/src/honeysql/format.clj
index 590bfc7..504c820 100644
--- a/src/honeysql/format.clj
+++ b/src/honeysql/format.clj
@@ -73,7 +73,7 @@
 (def infix-fns
   #{"+" "-" "*" "/" "%" "mod" "|" "&" "^"
     "and" "or" "xor"
-    "in" "not in" "like" "not like" "regexp"})
+    "in" "not in" "like" "not like" "regexp" "@@"})
 
 (def fn-aliases
   {"is" "="