diff --git a/src/kit/shell/src/shellEngine.c b/src/kit/shell/src/shellEngine.c
index 8dd9fe36c5dfffe4bbdcbf74633a520758e38420..04381f5382195bf5aa4326e6cb957a5dd8a51fdd 100644
--- a/src/kit/shell/src/shellEngine.c
+++ b/src/kit/shell/src/shellEngine.c
@@ -258,7 +258,7 @@ void shellRunCommandOnServer(TAOS *con, char command[]) {
     return;
   }
 
-  if (regex_match(command, "^\\s*use\\s+[a-zA-Z0-9]+\\s*;\\s*$", REG_EXTENDED | REG_ICASE)) {
+  if (regex_match(command, "^\\s*use\\s+[a-zA-Z0-9_]+\\s*;\\s*$", REG_EXTENDED | REG_ICASE)) {
     fprintf(stdout, "Database changed.\n\n");
     fflush(stdout);
     return;