diff --git a/rel/files/emqttd.cmd b/rel/files/emqttd.cmd
index 8a0d5eb73..effa49536 100644
--- a/rel/files/emqttd.cmd
+++ b/rel/files/emqttd.cmd
@@ -76,7 +76,7 @@ cd /d !dest_path!..\plugins
 set current_path=%cd%
 set plugins=
 for /d %%P in (*) do (
-set "plugins=!plugins!!current_path!\%%P\ebin "
+set "plugins=!plugins!"!current_path!\%%P\ebin" "
 )
 cd /d %node_root%
 
diff --git a/rel/files/start_erl.cmd b/rel/files/start_erl.cmd
index 76d2bbc3d..8285c0534 100644
--- a/rel/files/start_erl.cmd
+++ b/rel/files/start_erl.cmd
@@ -40,7 +40,7 @@ cd /d !dest_path!..\plugins
 set current_path=%cd%
 set plugins=
 for /d %%P in (*) do (
-set "plugins=!plugins!!current_path!\%%P\ebin "
+set "plugins=!plugins!"!current_path!\%%P\ebin" "
 )
 cd /d %node_root%
 @%erl_exe% %erl_args% -boot %boot_file% -config %app_config% -args_file %vm_args% -pa %plugins%