diff --git a/apps/emqx_rule_engine/src/emqx_rule_funcs.erl b/apps/emqx_rule_engine/src/emqx_rule_funcs.erl
index 9de7b0173..af8ac4603 100644
--- a/apps/emqx_rule_engine/src/emqx_rule_funcs.erl
+++ b/apps/emqx_rule_engine/src/emqx_rule_funcs.erl
@@ -155,6 +155,7 @@
     replace/4,
     regex_match/2,
     regex_replace/3,
+    regex_extract/2,
     ascii/1,
     find/2,
     find/3,
@@ -805,6 +806,8 @@ regex_match(Str, RE) -> emqx_variform_bif:regex_match(Str, RE).
 
 regex_replace(SrcStr, RE, RepStr) -> emqx_variform_bif:regex_replace(SrcStr, RE, RepStr).
 
+regex_extract(SrcStr, RE) -> emqx_variform_bif:regex_extract(SrcStr, RE).
+
 ascii(Char) -> emqx_variform_bif:ascii(Char).
 
 find(S, P) -> emqx_variform_bif:find(S, P).