diff --git a/configs/sim/nsh/defconfig b/configs/sim/nsh/defconfig
index e6dcd46af85..2014680b2c3 100644
--- a/configs/sim/nsh/defconfig
+++ b/configs/sim/nsh/defconfig
@@ -695,8 +695,11 @@ CONFIG_NSH_CONSOLE=y
 # CONFIG_SYSTEM_INIFILE is not set
 # CONFIG_SYSTEM_RAMTEST is not set
 CONFIG_SYSTEM_READLINE=y
+CONFIG_READLINE_HAVE_EXTMATCH=y
 CONFIG_READLINE_ECHO=y
 CONFIG_READLINE_TABCOMPLETION=y
+CONFIG_READLINE_MAX_BUILTINS=64
+CONFIG_READLINE_MAX_EXTCMDS=64
 # CONFIG_SYSTEM_RAMTRON is not set
 # CONFIG_SYSTEM_SDCARD is not set
 # CONFIG_SYSTEM_SUDOKU is not set