diff --git a/recipes-bsp/u-boot/u-boot-tools.inc b/recipes-bsp/u-boot/u-boot-tools.inc
index 09b3c3f..278360c 100644
--- a/recipes-bsp/u-boot/u-boot-tools.inc
+++ b/recipes-bsp/u-boot/u-boot-tools.inc
@@ -2,7 +2,7 @@ SUMMARY = "U-Boot bootloader tools"
 DEPENDS += "gnutls openssl util-linux swig-native"
 
 inherit python3native
-export STAGING_INCDIR="${STAGING_INCDIR_NATIVE}"
+export STAGING_INCDIR = "${STAGING_INCDIR_NATIVE}"
 
 PROVIDES = "${MLPREFIX}u-boot-mkimage ${MLPREFIX}u-boot-mkenvimage"
 PROVIDES:class-native = "u-boot-mkimage-native u-boot-mkenvimage-native"