diff --git a/tools/shell/inc/shellTire.h b/tools/shell/inc/shellTire.h
index b262aa68d8fe5850d52f3c7d6824a0f2ee7ad96e..bdcf7bcfb3310832b60cc66af5d07c16b7eb6134 100644
--- a/tools/shell/inc/shellTire.h
+++ b/tools/shell/inc/shellTire.h
@@ -78,7 +78,7 @@ bool insertWord(STire* tire, char* word);
 bool deleteWord(STire* tire, char* word);
 
 // match prefix words, if match is not NULL , put all item to match and return match
-SMatch* matchPrefix(STire* tire, char* prefix, SMatch* match);
+void matchPrefix(STire* tire, char* prefix, SMatch* match);
 
 // get all items from tires tree
 SMatch* enumAll(STire* tire);