diff --git a/meta-digi-arm/recipes-bsp/u-boot/u-boot-dey_2015.04.bb b/meta-digi-arm/recipes-bsp/u-boot/u-boot-dey_2015.04.bb
index 280b7b2d4..2e23c8b91 100644
--- a/meta-digi-arm/recipes-bsp/u-boot/u-boot-dey_2015.04.bb
+++ b/meta-digi-arm/recipes-bsp/u-boot/u-boot-dey_2015.04.bb
@@ -35,7 +35,7 @@ UBOOT_EXTRA_CONF ?= ""
 
 python __anonymous() {
     if (d.getVar("TRUSTFENCE_DEK_PATH", True) not in ["0", None]) and (d.getVar("TRUSTFENCE_SIGN", True) != "1"):
-         bb.fatal("Only signed U-Boot images can be encrypted. Generate signed images (TRUSTFENCE_SIGN=1) or remove encryption (TRUSTFENCE_DEK_PATH = 0)")
+         bb.fatal("Only signed U-Boot images can be encrypted. Generate signed images (TRUSTFENCE_SIGN = \"1\") or remove encryption (TRUSTFENCE_DEK_PATH = \"0\")")
 }
 
 do_compile () {