diff --git a/common/recipes-kernel/linux-firmware/linux-firmware_git.bbappend b/common/recipes-kernel/linux-firmware/linux-firmware_git.bbappend
index 97e64a59..23bb87f6 100644
--- a/common/recipes-kernel/linux-firmware/linux-firmware_git.bbappend
+++ b/common/recipes-kernel/linux-firmware/linux-firmware_git.bbappend
@@ -1,4 +1,4 @@
-FILESEXTRAPATHS_prepend := "${THISDIR/${PN}:"
+FILESEXTRAPATHS_prepend := "${THISDIR}/${PN}:"
 
 # This exists in Yocto 1.1, but include it here for completeness
 LIC_FILES_CHKSUM += "file://LICENCE.iwlwifi_firmware;md5=311cc823df5b1be4f00fbf0f17d96a6b"