diff --git a/Makefile b/Makefile
index 866a8c4f30511276685a8f73a4635166ab7ee9e1..a52296831a61d2a6f5c772bc62adaa0f847645af 100644
--- a/Makefile
+++ b/Makefile
@@ -363,7 +363,7 @@ export ARCH CPU BOARD VENDOR SOC CPUDIR BOARDDIR
 export CONFIG_SHELL HOSTCC HOSTCFLAGS HOSTLDFLAGS CROSS_COMPILE AS LD CC
 export CPP AR NM LDR STRIP OBJCOPY OBJDUMP
 export MAKE AWK PERL
-export DTC CHECK CHECKFLAGS
+export HOSTCXX HOSTCXXFLAGS DTC CHECK CHECKFLAGS
 
 export KBUILD_CPPFLAGS NOSTDINC_FLAGS UBOOTINCLUDE OBJCOPYFLAGS LDFLAGS
 export KBUILD_CFLAGS KBUILD_AFLAGS