diff --git a/recipes-bsp/linux/linux-sysmocom.inc b/recipes-bsp/linux/linux-sysmocom.inc
index 0aea7c2..b60586d 100644
--- a/recipes-bsp/linux/linux-sysmocom.inc
+++ b/recipes-bsp/linux/linux-sysmocom.inc
@@ -5,7 +5,7 @@ LICENSE = "GPLv2"
 LIC_FILES_CHKSUM = "file://COPYING;md5=d7810fab7487fb0aad327b76f1be7cd7"
 
 # Set this to 'preempt_rt' in the local.conf if you want a real time kernel
-LINUX_KERNEL_TYPE ?= standard
+LINUX_KERNEL_TYPE ?= "standard"
 
 module_autoload_mISDN_l1loop = "mISDN_l1loop"
 module_autoload_mISDN_dsp = "mISDN_dsp"