diff --git a/rules.mk b/rules.mk
index 6455fde3f14..17b71f9c447 100644
--- a/rules.mk
+++ b/rules.mk
@@ -175,6 +175,7 @@ PKG_CONFIG:=$(STAGING_DIR_HOST)/bin/pkg-config
 export PKG_CONFIG
 
 HOSTCC:=gcc
+HOSTCXX:=g++
 HOST_CPPFLAGS:=-I$(STAGING_DIR_HOST)/include
 HOST_CFLAGS:=-O2 $(HOST_CPPFLAGS)
 HOST_LDFLAGS:=-L$(STAGING_DIR_HOST)/lib
@@ -196,6 +197,7 @@ INSTALL_CONF:=install -m0600
 TARGET_CC_NOCACHE:=$(TARGET_CC)
 TARGET_CXX_NOCACHE:=$(TARGET_CXX)
 HOSTCC_NOCACHE:=$(HOSTCC)
+HOSTCXX_NOCACHE:=$(HOSTCXX)
 export TARGET_CC_NOCACHE
 export TARGET_CXX_NOCACHE
 export HOSTCC_NOCACHE
@@ -204,6 +206,7 @@ ifneq ($(CONFIG_CCACHE),)
   TARGET_CC:= ccache_cc
   TARGET_CXX:= ccache_cxx
   HOSTCC:= ccache $(HOSTCC)
+  HOSTCXX:= ccache $(HOSTCXX)
 endif
 
 TARGET_CONFIGURE_OPTS = \