diff --git a/meta/classes/ccache.bbclass b/meta/classes/ccache.bbclass
index cd06a4b..ca3ca43 100644
--- a/meta/classes/ccache.bbclass
+++ b/meta/classes/ccache.bbclass
@@ -1,5 +1,5 @@
 CCACHE = "${@bb.which(d.getVar('PATH', True), 'ccache') and 'ccache '}"
-export CCACHE_DIR = "${TMPDIR}/ccache/${MULTIMACH_HOST_SYS}/${PN}"
+export CCACHE_DIR ?= "${TMPDIR}/ccache/${MULTIMACH_HOST_SYS}/${PN}"
 CCACHE_DISABLE[unexport] = "1"
 
 do_configure[dirs] =+ "${CCACHE_DIR}"