diff --git a/src/kit/shell/src/shellImport.c b/src/kit/shell/src/shellImport.c
index cd8b06c91c71d8c08ae7ac362ee92719c6c05a08..347f99671db1bc9147c98d97ec708a3bf8bcf689 100644
--- a/src/kit/shell/src/shellImport.c
+++ b/src/kit/shell/src/shellImport.c
@@ -148,7 +148,11 @@ static void shellSourceFile(TAOS *con, char *fptr) {
   }
 
   char *fname = full_path.we_wordv[0];
-  
+  if (fname == NULL) {
+    fprintf(stderr, "ERROR: invalid filename\n");
+    return;
+  }
+
   if (access(fname, F_OK) != 0) {
     fprintf(stderr, "ERROR: file %s is not exist\n", fptr);