diff --git a/boards/risc-v/qemu-rv/rv-virt/configs/knsh64/defconfig b/boards/risc-v/qemu-rv/rv-virt/configs/knsh64/defconfig
index 5500f7d764..94fa232ae3 100644
--- a/boards/risc-v/qemu-rv/rv-virt/configs/knsh64/defconfig
+++ b/boards/risc-v/qemu-rv/rv-virt/configs/knsh64/defconfig
@@ -76,6 +76,7 @@ CONFIG_NSH_FILEIOSIZE=512
 CONFIG_NSH_FILE_APPS=y
 CONFIG_NSH_READLINE=y
 CONFIG_PATH_INITIAL="/system/bin"
+CONFIG_POSIX_SPAWN_PROXY_STACKSIZE=2048
 CONFIG_RAM_SIZE=1048576
 CONFIG_RAM_START=0x80100000
 CONFIG_READLINE_CMD_HISTORY=y