diff --git a/bsp/x86/Kconfig b/bsp/x86/Kconfig
index b8258393ad..334386f08f 100644
--- a/bsp/x86/Kconfig
+++ b/bsp/x86/Kconfig
@@ -1,16 +1,16 @@
 mainmenu "RT-Thread Configuration"
 
-config $BSP_DIR
+config BSP_DIR
     string
     option env="BSP_ROOT"
     default "."
 
-config $RTT_DIR
+config RTT_DIR
     string
     option env="RTT_ROOT"
     default "../.."
 
-config $PKGS_DIR
+config PKGS_DIR
     string
     option env="PKGS_ROOT"
     default "packages"